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Forces and Energy Full Topic Quiz

Total questions: 62

Worksheet time: 1hrs 12mins

Name
Class
Date
1.
What force holds the planets in motion around the sun?
a)
Magnetic
b)
Electrical
c)
Gravitational
d)
Air Resistance
2.
What force ultimately slows the roller coaster to a stop?
a)
Applied
b)
Normal
c)
Friction
d)
Magnetic
3.
An _______ force must act on an object for it to CHANGE it's motion
a)
balanced
b)
unbalanced
c)
gravitational
d)
electrical
4.

If the net force is equal to zero, the forces acting on the object are

a)

balanced

b)

unbalanced

5.
Balanced forces do not change the objects speed or 
a)
direction
b)
distance 
c)
time
d)
mass
6.
The unit of force is
a)
m/s
b)
m/s^2
c)
newton
d)
kg
7.
Forces that have a net force of zero ( the object is still).
a)
Balanced force
b)
Unbalanced force
8.
What is the net force?
a)
5000 N right
b)
4000 N right
c)
40 N left
d)
4000 N left
9.
What force does a parachute use to slow things down before hitting the ground?
a)
Friction
b)
Air resistance
c)
Water resistance
d)
Wind
10.
Which of these uses friction?
a)
A parachute
b)
A ball falling through the sky
c)
Brakes on a bike
d)
A wind turbine
11.
What do we call the forwards force produced by an aeroplane's engine or propeller?
a)
thrust
b)
friction
c)
weight
d)
gravity
12.
What word describes both the speed and direction of movement of an object?
a)
speed
b)
acceleration
c)
displacement
d)
velocity
13.
Two forces on an object are in opposite directions. How do we calculate the resultant force?
a)
divide one by the other
b)
multiply them
c)
find the difference between them
d)
add them together
14.
Is the car
a)
Stationary
b)
Moving at constant speed
c)
Accelerating
d)
Decelerating
15.
Is the car
a)
Stationary
b)
Moving at constant speed
c)
Accelerating
d)
Decelerating
16.
Is the car
a)
Stationary
b)
Moving at constant speed
c)
Accelerating
d)
Decelerating
17.
In a tug of war the left team pulls with a force of 200N. The right team pulls with a force of 150N.What is the resultant force?
a)
50N to the left.
b)
350N to the left.
c)
350N to the right.
d)
50N to the right.
18.
Wind blowing at 20 mph.Vector or scalar?
a)
Scalar
b)
Vector
19.
30 m/sec, East. Scalar or Vector
a)
Scalar
b)
Vector
c)
Neither
20.
A deer running 15 meters per second due west.Vector or scalar?
a)
Scalar
b)
Vector
21.
 Amy runs 2 miles south, then turns around and runs 3 miles north. What is displacement?
a)
5 miles
b)
1 mile 
c)
2 miles south
d)
1 mile north 
22.
A quantity that has both magnitude and direction is called a scalar quantity.
a)
True
b)
False
23.

Select the answer in which both quantities are vectors

a)

displacement, velocity

b)

acceleration, speed

c)

mass, time

d)

power, weight

24.

Two forces F1 and F2 act on an object as in the diagram above.


If F1 and F2 are drawn to scale, the resultant force can be found by measuring the length of the resultant line FR.


Which of the following diagrams shows the correct position of the line FR?

a)
b)
c)
d)
25.

A spring has a spring constant of 450 N/m. How far is the spring compressed if 150 N of force are used?

a)

2.2 m

b)

3m

c)

5.0 m

d)

0.3 m

26.

When comparing spring A to B,

a)

A has a larger spring constant than B so A is a stiffer spring

b)

B has a larger spring constant than A so A is a stiffer spring

c)

A has a larger spring constant than B so B is a stiffer spring

d)

B has a larger spring constant than A so B is a stiffer spring

27.

Which of the following springs is the stiffest?

a)

A spring that requires a force of 2000 N to compress it by 6.8 m.

b)

A spring that requires a force of 4000 N to stretch it by 9.0 m.

c)

A spring that requires a force of 8000 N to compress it by 45 m.

d)

A spring that requires a force of 4800 N to stretch it by 14 m.

28.

Spring constant is measured in

a)

N

b)

J

c)

m

d)

N/m

29.
When you release a stretched rubber band, the rubber band has ________ energy. 
a)
kinetic 
b)
potential
c)
none of the above
d)
all of the above 
30.

The figure shows the forces acting on a child who is balancing on a pogo stick.

The child and pogo stick are not moving.

The downward force of the child on the spring is equal to the upward force of the spring on the child.

This is an example of which one of Newton’s Laws of motion? (this is from Mechanics 1 last term)

a)

First law

b)

Second law

c)

Third law

31.

Complete the sentence - The compressed spring stores ..........................................

a)

elastic potential energy

b)

gravitational potential energy

c)

kinetic energy

d)

electrostatic energy

32.

The child has a weight of 343 N.

Gravitational field strength = 9.8 N / kg

Select the equation which links gravitational field strength (g), mass (m) and weight (w).

a)

w = m g

b)

g = m w

c)

m = g w

d)

m = g + w

33.

When the forces are removed the object will go back to its original shape.

a)

This is elastic behaviour

b)

This is inelastic behaviour

34.

When the forces are removed the object will NOT go back to its original shape, it is permanently deformed.

a)

This is elastic behaviour

b)

This is inelastic behaviour

35.

If you calculate the area under the graph in the springs core practical, it tells you...

a)

the energy transferred (work done) in stretching ths spring.

b)

the spring constant of the spring

36.

If you calculate the gradient in the springs core practical, it tells you...

a)

the energy transferred (work done) in stretching ths spring.

b)

the spring constant of the spring

37.
We use levers to make work easier.?
a)
True
b)
False
38.
What is the anticlockwise moment acting on this crane?
a)
80,000Nm
b)
100,000Nm
c)
120,000Nm
d)
140,000Nm
39.
What is the moment acting on the seesaw?
a)
1.6Nm
b)
15Nm
c)
16N
d)
4Nm
40.
What is the moment produced by the 15 N?
a)
15 Nm (clockwise)
b)
150 Nm (anti - clockwise)
c)
1.5 Nm (anti - clockwise)
d)
0.15 Nm (clockwise)
41.
A seesaw is unbalanced with two people of different masses sitting equal distances from the center. Which of the following will result in equilibrium?
a)
The larger person moving further away from the center.
b)
Moving the smaller person closer to the center.
c)
Moving the smaller person further from the center.
d)
Making the larger person do nothing.
42.
The easiest way to open a heavy door  is by applying the force
a)
Near the hinges
b)
In the middle of the door
c)
At the edge of the door far from the hinges
d)
At the top of the door
43.

A nut can be loosened more easily with

a)

a short spanner because a larger turning effect can be produced.

b)

a long spanner because a larger turning effect can be produced.

c)

a long spanner because a larger force can be produced.

d)

a short spanner because a larger force can be produced.

44.

What is energy?

a)

moving energy

b)

stored energy

c)

renewable energy

d)

The ability to do work.

45.
Energy due to motion is ____________ energy. 
a)
Potential 
b)
Energy
c)
Kinetic
d)
Friction
46.
The faster an object moves, the ________ kinetic energy it has. 
a)
more
b)
less
c)
none of the above
d)
all of the above 
47.
At which point is potential energy greatest?
a)
W
b)
X
c)
Y
d)
Z
48.
At which point is kinetic energy greatest? 
a)
W
b)
X
c)
Y
d)
Z
49.
Energy can be _____________ or changed from one type to another.
a)
destroyed
b)
transferred
c)
created
d)
ignored
50.

The Law of Conservation of Energy states:

a)

Energy can created or destroyed but not transformed

b)

Energy cannot be created or destroyed, it can only transformed

c)

Energy can't be created, destroyed or transformed

d)

Energy cannot be created or destroyed.

51.

What is the formula for Kinetic Energy?

a)

KE = mass x velocity

b)

KE= 1/2 x mass x velocity 2

c)

KE = mass x gravity x height

d)

KE = mass x velocity / 2

52.
The law of energy conservation says the total energy before the change _______ the total energy after it
a)
is less than
b)
is more than
c)
affects
d)
equals
53.

Total energy = 200J
Useful energy = 20J

Workout the efficiency of this lightbulb.
 efficiency = useful enegytotal energy in ×100efficiency\ =\ \frac{useful\ enegy}{total\ energy\ in}\ \times100  

a)

100%

b)

80%

c)

40%

d)

10%

54.

A lightbulb with efficiency of 10% would be

a)

efficient

b)

inefficient

55.

Total energy = 350J
Useful energy = 70J

Workout the efficiency of this iphoneX.
 efficiency = useful energytotal energy in ×100%efficiency\ =\ \frac{useful\ energy}{total\ energy\ in}\ \times100\%  

a)

100%

b)

80%

c)

40%

d)

20%

56.

Total energy = 1000J
Useful energy = 1000J

Workout the efficiency of this hairdryer.
 efficiency = useful energytotal energy in  ×100%efficiency\ =\ \frac{useful\ energy}{total\ energy\ in\ }\ \times100\%  

a)

100%

b)

50%

c)

40%

d)

20%

57.

This car needs 8600J of energy to power it. If 5000J is changed into useful energy, how much energy is wasted?

a)

13600J

b)

3600J

c)

5000J

d)

8600J

58.
Power is a measure of how much ______ can be done in a set amount of ______.
a)
Work, Time
b)
Work, Energy
c)
Energy, Force
d)
Force, Work
59.
Work is a measure of the energy needed to apply a force across a _______.
a)
time
b)
distance
c)
gravity
d)
object
60.

Power is how much energy changes every (a)   .

61.

The unit of power is

a)

Watts

b)

Joules

62.

The unit of work done (energy transfer) is

a)

Watts

b)

Joules

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