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Semester 2 Final Review 2024

Total questions: 121

Worksheet time: 2hrs 40mins

Name
Class
Date
1.

How does quickly closing a valve change the pressure in a pipe?

a)

It doesn't

b)

It causes a very large permanent increase in pressure in the pipe

c)

It causes a very large temporary increase in pressure called water hammer

d)

It causes a large permanent decrease in pressure behind the valve.

2.

A person walks 4 km east and then 3 km north. What is the magnitude of the person's displacement?

a)

5 km

b)

7 km

c)

12 km

d)

6 km

3.

If a force of 10 N is applied at an angle of 30° above the horizontal, what is the horizontal component of the force?

a)

5 N

b)

8.66 N

c)

10 N

d)

6.5 N

4.

If a force of 10 N is applied at an angle of 30° above the horizontal, what is the vertical component of the force?

a)

5 N

b)

8.66 N

c)

10 N

d)

6.5 N

5.

Two forces, 5 N and 7 N, are applied at a point and are at right angles to each other. What is the magnitude of the resultant force?

a)

8.6 N

b)

12 N

c)

9.22 N

d)

10.6 N

6.

A force vector has a magnitude of 50 N and is directed at an angle of 60° above the horizontal. What is the vertical component of this force?

a)

25 N

b)

43.3 N

c)

50 N

d)

30 N

7.

A force vector has a magnitude of 50 N and is directed at an angle of 60° above the horizontal. What is the horizontal component of this force?

a)

25 N

b)

43.3 N

c)

50 N

d)

30 N

8.

If two displacement vectors of magnitudes 3 m and 4 m make a right angle with each other, what is their resultant displacement?

a)

5 m

b)

7 m

c)

12 m

d)

6 m

9.

What is the angle of a force vector that has equal horizontal and vertical components? (what angle makes the legs of the triangle equal)

a)

45°

b)

90°

c)

30°

d)

60°

10.

A force of 30 N is applied at an angle of 45° to the horizontal. What is the resultant force in the horizontal direction?

a)

21.21 N

b)

30 N

c)

15 N

d)

22.5 N

11.

If a force of 20 N is applied at an angle of 60° to the horizontal, what is the resultant force in the vertical direction?

a)

10 N

b)

17.32 N

c)

20 N

d)

15 N

12.

A displacement vector has a magnitude of 100 m and is directed at an angle of 30° north of east. What is the eastward component of this displacement?

a)

86.6 m

b)

50 m

c)

100 m

d)

75 m

13.

A person walks 15 m east, 10 m south, 5 m west, and then 5 m north. What is the net displacement of the person?

a)

11.18 southeast

b)

10 m East

c)

5 m East and 5 m South

d)

5 m south

14.

A force vector has a magnitude of 25 N and is directed at an angle of 45° above the horizontal. What is the horizontal component of this force?

a)

17.68 N

b)

25 N

c)

12.5 N

d)

22.5 N

15.

Two displacement vectors, one of 8 m north and another of 6 m east, are added. What is the magnitude of the displacement?

a)

10 m

b)

14 m

c)

70 m

d)

44 m

16.

A person walks 3 km north, then 4 km east, and finally 3 km south. What is the net displacement of the person?

a)

4 km East

b)

5 km Northeast

c)

7 km East

d)

6 km East

17.

If a force of 50 N is applied at an angle of 45° to the horizontal, what is the vertical component of the force?

a)

35.36 N

b)

50 N

c)

25 N

d)

45 N

18.

A displacement vector has a magnitude of 200 m and is directed at an angle of 60° north of east. What is the northward component of this displacement?

a)

100 m

b)

173.2 m

c)

200 m

d)

150 m

19.

A force of 100 N is applied at an angle of 60° above to the horizontal. What is the resulting horizontal force?

a)

50 N

b)

86.6 N

c)

100 N

d)

75 N

20.
Sin 30°
a)
√3/2
b)
-1/2
c)
1/2
d)
-√3/2
21.
Cos 0
a)
-1
b)
0
c)
1
d)
undefined
22.
Cos 90°
a)
-1
b)
1
c)
undefined
d)
0
23.

A 20 N bowing ball is hanging from two strings both strings are at an angle of 12 degrees above the horizontal. What is the tension on each string? (assume the tensions are equal)

a)

10 N

b)

48.10 N

c)

2.08 N

d)

20 N

24.

What is the normal force that the table applies to a 25 N box that has a rope pulling on it with 10 N straight up?

a)

25 N

b)

10 N

c)

15 N

d)

35 N

25.

A 50 N box is sitting on a table. The box is being pulled by a rope with a force of 40 N at an angle of 60° above the horizontal. What is the normal force that the table applies to box?

a)

25 N

b)

10 N

c)

15.36 N

d)

34.64 N

26.

For a lever to move, do forces have to be balanced or unbalanced

a)

balanced

b)

unbalanced

27.

You need to lift a heavy statue 30 feet into the air. Which simple machine would be best to use?

a)

Wheel and Axle

b)

Inclined Plane

c)

Pulley

d)

Wedge

28.

What is a push or pull that causes an object to move, stop, or change direction?

a)

force

b)

gravity

c)

inertia

d)

friction

29.

This is a rod balanced on a fixed point that can help

lift a heavy weight with less effort.

a)

pulley

b)

inclined plane

c)

wheel and axle

d)

lever

30.

This machine uses wheels and a rope to raise, lower, or move a load

a)

pulley

b)

inclined plane

c)

wheel and axle

d)

lever

31.

This is used to carry loads around easily for long distances with less effort

a)

pulley

b)

inclined plane

c)

wheel and axle

d)

lever

32.

This is any slope or ramp that makes it easier to lift something.

a)

pulley

b)

inclined plane

c)

wheel and axle

d)

lever

33.

This is an inclined plane wrapped in a spiral

a)

screw

b)

inclined plane

c)

wheel and axle

d)

wedge

34.

Match the following

a)

jar lid

1.

screw

b)

window shade

2.

pulley

c)

axe

3.

wedge

d)

stairs

4.

inclined plane

e)

scissors

5.

lever

35.

How does a wheel barrow helps us to work easier?

a)

It can carry heavy load of soil and other construction materials

b)

It stops the motion of the object

c)

It can move without pushing it

d)

It can clean the surroundings

36.
a)

Pulley

b)

Inclined plane

c)

Lever

d)

Screw

e)

Wheel and axle

37.
a)

Wedge

b)

Wheel and axle

c)

Screw

d)

Pulley

e)

Lever

38.
a)

Pulley

b)

Lever

c)

Wedge

d)

Screw

e)

Inclined plane

39.
a)

Wheel and axle

b)

Inclined plane

c)

Pulley

d)

Wedge

e)

Lever

40.
a)

Wedge

b)

Lever

c)

Pulley

d)

Wheel and axle

e)

Screw

41.
a)

Wedge

b)

Screw

c)

Lever

d)

Inclined Plane

e)

Pulley

42.

What is a lever?

a)

It is a flexible bar that rests on a fixed point.

b)

It is a rigid circle that rests on a fixed point.

c)

It is a rigid bar that rests on a fixed point.

43.

Name this simple machine.

a)

Lever

b)

Wedge

c)

Pulley

d)

Inclined Plane

44.

Name this simple machine.

a)

Pulley

b)

Wheel and Axle

c)

Inclined Plane

d)

Lever

45.

Which simple machine is used in a wheelchair?

a)

ramp

b)

pulley

c)

wheel and axle

46.

What RAMP you can find on a playground?

a)

slide

b)

swing

c)

seesaw

47.

What is the point that is on top of the triangle under the rod?

a)

pulley

b)

ramp

c)

fulcrum

48.

What happens if you decrease the distance between

the fulcrum and the load?

a)

You use more force

b)

You use less force

c)

You use a fulcrum

49.

Where is the fulcrum in CLASS-1 LEVER?

a)

in the middle

b)

at one end

c)

under the rod

50.

If the distance is longer, the effort becomes ..........

a)

more

b)

less

c)

the same

51.

What defines a third-class lever?

a)

The fulcrum is in the exact center

b)

The fulcrum is between the effort and the load

c)

The fulcrum and effort are at the same end

52.

A simple machine is a device that helps to reduce the amount of _____ required to do the same amount of work.

a)

force

b)

energy

c)

work

53.
How can an incline plane reduce the amount of force required to lift an object?
a)
increase the length of the ramp
b)
increase the height of the ramp
c)
decrease the length of the ramp
54.

________________ is done whenever a force moves an object a distance.

a)

Load

b)

Friction

c)

Force

d)

Work

55.

Simple machines can make work easier by reducing the input force needed to move an object. However, there is a trade off for decreased input. What is the trade off?

a)

The distance the object is moved is increased.

b)

The distance the object is moved is decreased.

c)

The amount of work is increased.

d)

The amount of work is decreased.

56.
Which type simple machine would the base of a light bulb be?
a)
screw
b)
wedge
c)
wheel and axle
d)
pulley
57.

A simple machine that splits an object apart is a _______.

a)

Wheel and Axel

b)

fulcrum

c)

wedge

d)

lever

58.

A ramp is an example of a(n) _______.

a)

inclined plane

b)

fulcrum

c)

force

d)

lever

59.

The bow or front of a boat splits the water as the boat moves. What kind of simple machine would the bow of the boat be?

a)

wedge

b)

screw

c)

ramp

d)

lever

60.

Using the back of a hammer makes it much easier to remove a nail from a wooden board. What kind of simple machine would the hammer be classified as if you are using it for this purpose?

a)

Wedge

b)

Lever

c)

Pullye

d)

Inclined Plane

61.

What is the formula needed to solve for work?

a)

w = f/d

b)

w = f*d

c)

w = f+d

62.

If you push a cart with a force of 60 N for 2 m, how much work have you done?

a)

120 J

b)

30 J

c)

120 N

d)

30 N

63.

Two people shove on a wall with 100 N of force. The wall does not move. How much work have they done?

a)

100J

b)

100N

c)

0J

d)

0N

64.

When we're talking about a pendulum, what does T stand for?

a)

pi

b)

period

c)

length

d)

gravity

65.

What is the unit for the period of a pendulum?

a)

second

b)

meter

c)

m/s/s

d)

Newton

66.

Which of these does not affect the period of a pendulum?

a)

length

b)

gravity

c)

mass

67.

A pair of trapeze performers at the circus is swinging from ropes attached to a large elevated platform. Suppose that the performers can be treated as a simple pendulum with a length of 16 m. Determine the period for one complete back and forth cycle.

a)

2 sec

b)

12 sec

c)

8 sec

d)

10 sec

68.

Which would have the longest period?

Pendulum A: A 200-g mass attached to a 1.0-m length string

Pendulum B: A 400-g mass attached to a 0.5-m length string

a)

A

b)

B

c)

Same

69.

You are using a 20 m long ramp to lift a 2000 N object up 5 m. How much force do you have to push it with up the ramp?

a)

500 N

b)

200000 N

c)

0.05 N

d)

8000 N

70.

What is the formula for the period of a simple pendulum?

a)

T=2πLgT = 2\pi\sqrt{\frac{L}{g}}

b)

T=12πgLT = \frac{1}{2\pi}\sqrt{\frac{g}{L}}

c)

T=2πgLT = 2\pi\sqrt{\frac{g}{L}}

d)

T=LgT = \frac{L}{g}

71.

A pair of scissors is an example of which class of lever?

a)

Class 1

b)

Class 2

c)

Class 3

d)

Class 4

72.

You have a 12 N box that is 0.5 m from the fulcrum. How much force would you have to apply to balance the box if you were 3 m from the fulcrum?

a)

2 N

b)

4 N

c)

72 N

d)

1.25 N

73.

You are looking at a chain of gears and you need to know what RPM the 3rd gear in the chain will turn. You know that the first gear has 20 teeth and is connected to a motor that will rotate with 1000 RPM. If the third gear has 5 teeth what will its RPM be?

a)

4000 RPM

b)

500 RPM

c)

20 RPM

d)

1000 RPM

74.

You are looking at a pulley system that is lifting a 1000 N block. If the force needed to lift the block is 500 N, how many strings are coming out of the bottom set of movable pulleys (how many stings are supporting the weight)?

a)

2

b)

4

c)

1

d)

5

75.

What does a differential in a car do?

a)

It allows the wheels to turn at different speeds while still receiving power from the engine.

b)

It keeps the wheels turning at the same speeds.

c)

It allows the car to shift gears.

d)

It transforms the car in to something different.

76.

What is the purpose of the transmission in a car?

a)

It allows the car to change gears.

b)

It turns the car on.

c)

It transmits radio signals.

d)

It tells the police how fast you are going.

77.

What type of gear set would you expect to find in an automatic transmission?

a)

A planetary gear set

b)

Any gear set can be used

c)

A galactic gear set.

d)

A normal chain of gears.

78.

What gears make up a planetary gear set?

a)

Sun gear, planet gears, and ring gear

b)

Moon gear, worm gear, and galactic gears

c)

Shell gears, planet gears, and egg gears

d)

Earth gears, Mars gears, and Jupiter gears.

e)

Just normal gears

79.

You have a horizontal pipe that is full of stationary water. How does the pressure on the left side compare to the pressure on the right side?

a)

They are the same

b)

The left side has higher pressure

c)

The right side has higher pressure

d)

You cannot have a pipe with stationary water in it.

80.

The pipe changes height from y1 = 2 m to y2 = 3 m. Area1 = Area2.

Which of the following is true?

Hint: think Potential Energy and Kinetic Energy and remember that PE = mgh

a)

P1 > P2

b)

P1 < P2

c)

P1 = P2

d)

not enough information to solve

81.
What do we call the the amount of force exerted on a certain area?
a)
fluid
b)
pressure
c)
buoyant
82.

What is the SI unit of pressure?

a)

Kg/m3

b)

Pa

c)

kg m-3

d)

N m2

83.

What is the formula for pressure?

a)

P = F / A

b)

P = F A

c)

P = A / F

d)

F = P / A

84.

The pressure resulting from a force of 50 N exerted over an area of 5 m2 is

a)

10 Nm2

b)

0.1 Nm2

c)

10 N m-2

d)

0.1 Pa

85.

Any substance that can easily flows and therefore can easily change shape.

a)

Fluid

b)

Liquid

c)

Gas

d)

Solid

86.

Fluids flow

a)

only when warmed up.

b)

from regions of low pressure to regions of high pressure.

c)

until evenly spread out.

d)

from high to low pressure.

87.

When you increase your depth under water, the water pressure on your body

a)

increases

b)

decreases

c)

stays the same

88.

In a hydraulic machine, a force of 2.25 N is applied on the piston of area 5 cm2. what force is obtained on the bigger pistion of area 100cm2 ?

a)

45 N

b)

225 N

c)

450 N

d)

22.5 N

89.

Calculate the pressure at the bottom of a cylindrical vessel filled with water.Area of cross section is 250 cm2. density of water is 1000 kg m-3. water is filled to a height of 0.1 m .

a)

250 Pa

b)

105 Pa

c)

2500 Pa

d)

981 Pa

90.

Is 30 m/sec East a Scalar or Vector

a)
Scalar
b)
Vector
c)
Neither
91.
This is speed in a specific direction.
a)
Velocity
b)
Motion
c)
Position
92.

What is mass?

a)

The weight of the object

b)

How much matter is in the object

c)

How much space it takes up

d)

The force of gravity on the object

93.

What is weight?

a)

The mass of the object

b)

How much matter is in the object

c)

How much space it takes up

d)

The force of gravity on the object

94.

You need to lift a heavy statue 30 feet into the air. Which simple machine would be best to use?

a)

Wheel and Axle

b)

Inclined Plane

c)

Pulley

d)

Wedge

95.

This machine uses wheels and a rope to raise, lower, or move a load

a)

pulley

b)

inclined plane

c)

wheel and axle

d)

lever

96.

This is any slope or ramp that makes it easier to lift something.

a)

pulley

b)

inclined plane

c)

wheel and axle

d)

lever

97.

How does a wheel barrow helps us to work easier?

a)

It can carry heavy load of soil and other construction materials

b)

It stops the motion of the object

c)

It can move without pushing it

d)

It can clean the surroundings

98.

What is a lever?

a)

It is a flexible bar that rests on a fixed point.

b)

It is a rigid circle that rests on a fixed point.

c)

It is a rigid bar that rests on a fixed point.

99.

A simple machine is a device that helps to reduce the amount of _____ required to do the same amount of work.

a)

force

b)

energy

c)

work

100.

If you push a cart with a force of 60 N for 2 m, how much work have you done?

a)

120 J

b)

30 J

c)

120 N

d)

30 N

101.

Two people shove on a wall with 100 N of force. The wall does not move. How much work have they done?

a)

100J

b)

100N

c)

0J

d)

0N

102.
According to Pascal’s principle, in a hydraulic system a pressure exerted on a piston produces an equal increase in pressure on another piston in the system. If the second piston has an area 10 times that of the first, the force on the second piston is 10 times greater, though the pressure is the same as that on the first piston.
a)
True
b)
False
103.
True or false... "mass" is the exact same thing as "weight"?
a)
True
b)
False
104.

HYDRUALICS SYSTEM...

a)

Uses power to make things move.

b)

Uses fluid to make things move.

105.

The basic idea behind any hydraulic system is very simple: Force that is applied at one point is tranitted to another point using________

a)

A compressible fluid

b)

An incompressible fluid

c)

A cold compress

d)

A hot compress

106.

Where can you look on your car to see a good example of a basic piston-driven hydraulic system?

a)

The blinkers (you should always check your blinker fluid)

b)

The instrument panel

c)

The brake system

d)

The radio system

107.

The great thing about hydraulic systems is that the pipe connecting the two cylinders can be__________

a)

Disconnected, yet still operate

b)

Any length and shape

c)

Filled with air

d)

All of the above

108.

Which of the following sentence is true?

a)

Gases are easy to squish

b)

Liquids are easy to squish

109.
The amount of force pushing on an area is the definition of....
a)
Fluid
b)
Viscosity
c)
Barometer
d)
Pressure
110.
Army tank tracks are useful for travelling through the mud because..
a)
they decrease the force the vehicle exerts on the ground
b)
they increase the force the vehicle exerts on the ground
c)
they decrease the pressure the vehicle exerts on the ground
d)
they increase the pressure the vehicle exerts on the ground
111.

Zara has four different styles of shoes.

Which shoes will exert the greatest pressure on the floor when Zara wears them?

a)

b)

c)

d)

112.

Pressure can be exerted by solids, liquids and gases.

a)

TRUE

b)

FALSE

113.

What is the purpose of a water tower?

a)

To store water for later

b)

To maintain constant pressure in the water mains.

c)

To tell you what town you just entered.

d)

To reduce pressure at the water treatment plant.

114.

What is a Barometer?

a)

It is a device that is used to measure water temperature.

b)

It is a device that is used to measure pressure in water mains.

c)

It is a device that measures atmospheric pressure.

d)

It is a device that measures the length of bars in meters.

115.

What happens to water when you put it in a vacuum?

a)

It starts to boil because of the release of pressure.

b)

It just sits there.

c)

It gets really hot. If you leave it long enough it might get hot enough to boil.

d)

It spontaneously disappears.

116.

Match the following variables with their units

a)

Velocity

1.

m/s

b)

Acceleration

2.

m/s^2

c)

Distance

3.

m

d)

Time

4.

s

e)

Force

5.

N

117.

A measurement of how quickly an object is changing speed is ​ (a)  

Choose from the below words
acceleration
speed
velocity
force
118.

Which of the following is a unit of force?

a)

Joule

b)

Newton

c)

Watt

d)

Meter per second

119.

You have a container that has 0.5 m of mercury in it. If the density of mercury is 13,600 kg/m^3 what is the pressure at the bottom of the container?

a)

6800 Pa

b)

66708 Pa

c)

13600 Pa

d)

66708 N

120.

What happens in a pipe with flowing water when you quickly close a valve?

a)

Nothing in particular

b)

The water just stops moving

c)

The water stopping creates a large pressure spike called water hammer.

d)

The pressure in the pipe goes down slowly

121.

You have a 1000 m long water main with water running through it. How does the pressure change over the length of the pipe? (assume that it is horizontal)

a)

The pressure at the end of the pipe is higher than the beginning.

b)

The pressure at the end of the pipe is lower than at the beginning.

c)

The pressure is the same at every point along the pipe.

d)

There is no pressure in the pipe.

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