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RECF Mechanics Practice

Total questions: 80

Worksheet time: 40mins

Name
Class
Date
1.
What is velocity?
a)
the quickness of an object
b)
the location of an object
c)
acceleration
d)
speed in a specific direction
2.
What is the formula to calculate speed?
a)
S = t/d
b)
S = d/t
c)
S = d x t
d)
S = t x d
3.
The speedometer on your car tells you
a)
average velocity
b)
instantaneous velocity
c)
average speed
d)
instantaneous speed
4.
A dog runs with an initial speed of 7.5 m/s to a stop in 15 seconds.  What is the dog's acceleration?
a)
-7.5 m/s
b)
-7.5 m/s2
c)
-0.5 m/s2
d)
7.5 mi//hr
5.
The SI unit for time is
a)
second (s)
b)
minute (min)
c)
hour (hr)
d)
year (yr)
6.
What is the SI unit for acceleration?
a)
m/s
b)
m
c)
m/s2
d)
s
7.
What is the SI unit for speed and velocity?
a)
Km
b)
s
c)
m/s
d)
m/s2
8.
Wind blowing at 20 mph.Vector or scalar?
a)
Scalar
b)
Vector
9.
30 m/sec, East. Scalar or Vector
a)
Scalar
b)
Vector
c)
Neither
10.
Scott travels north 5 miles and then goes west 3 miles before coming straight back south 2 miles. What is his distance?
a)
10 miles
b)
7 miles
c)
8 miles
d)
6 miles
11.
Distance and direction of an object's change in position from a starting point
a)
displacement
b)
distance
c)
motion
d)
reference point
12.
 Ray runs 30 feet north, 30 feet west, and then 30 feet south. What is the distance?
a)
90 feet
b)
30 feet
c)
60 feet
d)
0 feet
13.
 Ray runs 30 feet north, 30 feet west, and then 30 feet south. What is the displacement?
a)
30 feet west
b)
90 feet 
c)
30 feet south
d)
0 feet
14.
What is magnitude?
a)
The direction that describes a quantity.
b)
A numerical value
c)
A unit of force
15.

Force is a

a)

Vector

b)

Scalar

16.

Mass is a

a)

Vector

b)

Scalar

17.

Speed is

a)

Vector

b)

Scalar

18.

Velocity is

a)

Vector

b)

Scalar

19.
"For every action, there is an equal and opposite reaction."
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
d)
Newton's 4th Law
20.
Force = Mass x Acceleration
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
d)
Newton's 4th Law
21.
An archer pulls the bowstring back, then releases the string and the arrow flies forward. Pulling the string back is the...
a)
action force
b)
reaction force
c)
net force
d)
inertia
22.
An archer pulls the bowstring back, then releases the string and the arrow flies forward. The arrow flying forward is the...
a)
action force
b)
reaction force
c)
net force
d)
inertia
23.

Mass = 4 kg and a = 0.2 ms-2. Calculate the force.

a)

8N

b)

80 N

c)

2 N

d)

0.8N

24.

Force = 20 N and Mass = 4 kg. Calculate the acceleration.

a)

80 N

b)

80 ms-2

c)

5 ms-2

d)

0.2 ms-2

25.

Force = 12 N and acceleration = 2 ms-2. Calculate the mass.

a)

6 ms-2

b)

24 kg

c)

6 kg

d)

6 g

26.
What is the net force?
a)
65 N left
b)
65 N right
c)
35 N left
d)
35 N right
27.

The diagram below shows a toy car moving along a smooth, frictionless track. In which sections of the track will this toy car experience unbalanced forces?

a)

Sections 1 and 3

b)

Sections 1 and 2

c)

Sections 2 and 4

d)

Sections 3 and 4

28.
Scott drives a Jeep 12 km east, then 4 km north, then finally 3 km west. He traveled a total distance of:
a)
5 km
b)
10 km
c)
13 km
d)
19 km
29.
Liza is swimming laps from one end of a 50 meter pool to the other. Going from one end to the other is considered one lap. If she swims four complete laps, which statement is TRUE?
a)
Her distance and displacement are both zero.
b)
Her distance is zero, but her displacement is 200 meters.
c)
Her distance is 200 meters, but her displacement is zero.
d)
Her distance and displacement are both 200 meters.
30.

The sum of all movements from start to the end of motion is best described as____.

a)

distance

b)

displacement

c)

motion

d)

donkey

31.

The change in an objects position from the final position to initial position.

a)

displacement

b)

distance

c)

motion

d)

reference point

32.
Vector quantities need both a magnitude and a _____.
a)
distance
b)
displacement
c)
direction
d)
velocity
33.
The scientific (SI) unit for measuring distance is the ________ .
a)
mile
b)
foot
c)
kilometer
d)
meter
34.
Displacement is distance combined with
a)
direction
b)
speed
c)
velocity
d)
magnitude
35.
A ramp.
a)
Lever
b)
Inclined Plane
c)
Wedge
d)
Screw
36.
What type of simple machine is shown here?
a)
Pulley
b)
Wheel and Axle
c)
Lever
d)
Wedge
37.
What is the function of the smaller gear?
a)
Makes the output gear turn slower
b)
Makes the output gear turn faster
c)
Makes the larger gears turn in opposite directions.
d)
Makes the larger gears turn in the same direction.
38.

____________ gears come in pairs that mate together to transfer power between perpendicular shafts that have axes of rotation offset from one another. These gears resemble screws; as they spin they turn their mating wheel.

a)

Spur gears

b)

Bevel Gears

c)

Crown Gears

d)

Worm gears

39.

In order for two gears to mesh, they need to have the same size (and shape) teeth on the same spacing, known as what?

a)

Gear ratio

b)

Gear aptitude

c)

Gear pitch

d)

Gear crest

40.

A gear mounted to a straight rod, such that it moves in a linear fashion when torque is applied to it by a spur gear (known as the pinion gear).

a)

Spur Gear

b)

Crown Gear

c)

Bevel Gear

d)

Rack Gear

41.

A type of bevel gear in which the teeth project perpendicular to the gear face.

a)

Spur Gear

b)

Bevel Gear

c)

Crown Gear

d)

Worm Gear

42.

Conically shaped gears that transmit power between shafts that have intersecting axes of rotation.

a)

Spur Gear

b)

Bevel Gear

c)

Rack Gear

d)

Crown Gear

43.

Transfers motion between two shafts running parallel to each other. They are characterized by their teeth, which are straight and parallel to the gears axis of rotation.

a)

Spur Gear

b)

Worm Gear

c)

Bevel Gear

d)

Crown Gear

44.
Which class of lever is represented in the picture?
a)
1st class lever
b)
2nd class lever
c)
3rd class lever
d)
None of the above
45.
Which class of lever is represented in the picture?
a)
1st class lever
b)
2nd class lever
c)
3rd class lever
d)
None of the above
46.
Which class of lever is represented in the picture?
a)
1st class lever
b)
2nd class lever
c)
3rd class lever
d)
None of the above
47.

What's the gear ratio, as a decimal??

a)

0.43

b)

0.71

c)

1.00

d)

1.4

e)

2.33333333333

48.

What's the gear ratio, as a decimal??

a)

0.43

b)

0.71

c)

1.00

d)

1.4

e)

2.33333333333

49.
What happens to the speed in this mechanism?
a)
Increases
b)
Decreases
c)
Remains Constant
50.

What's the gear ratio?

a)

1:3

b)

5:15

c)

3:1

d)

75:25

51.
work is...
a)
energy from the sun
b)
a type of machine
c)
a force that moves an object
d)
a force that pulls you toward the earh
52.
Which is not a type of simple machine?
a)
spring
b)
screw
c)
pulley
d)
wedge
53.
Which is an example of someone using a simple machine to do work?
a)
a boy runs across a football field
b)
a banker counts money
c)
a mother pushes a stroller up a ramp
d)
a girl eats a sandwich
54.
Which is a characteristic of a simple machine?
a)
They run on electricity.
b)
They take a long time to make.
c)
They have few or no moving parts.
d)
They are not very large.
55.
Jan is using a screwdriver, which is a type of ...
a)
a pulley
b)
a screw
c)
a lever
d)
a wheel and axle
56.
A flat sloping surface that connects lower and higher elevations. It makes raising objects easier.  
a)
wedge
b)
screw
c)
lever
d)
inclined plane 
57.
The fixed point on the lever is called 
a)
load
b)
resistance
c)
bar
d)
fulcrum
58.
What do you call a machine made up of two or more simple machines?
a)
complicated machine
b)
compound or complex machine
c)
comprehensive machine
d)
constructive machine
59.
Identify this simple machine
a)
Lever
b)
Wheel & Axle
c)
Inclined Plane
d)
Screw
60.
Mechanical Advantage (MA) is:
a)
Ratio of the magnitude of the resistance and effort forces
b)
Ratio of distance traveled by the effort and the resistance force
c)
All of the above
d)
None of the above
61.
If MA is greater than 1:
a)
Proportionally less effort force is required to overcome the resistance force
b)
Proportionally greater effort force is required to overcome the resistance force
c)
Proportionally less effort distance is required to overcome the resistance force
d)
MA cannot be greater than 1
62.
How much work is produced when 200 N is used to move a car 5 m?
a)
40 J
b)
205 J
c)
1000J
d)
195 J
63.
What is the equation for work?
a)
F x D
b)
F = M x A
c)
y = mx + b
d)
E = MC2
64.
Using a lever, Joe is able to lift a 10,000 N car off of the ground with a force of 1000 N. What is the mechanical advantage of the lever?
a)
1
b)
10
c)
100
d)
1000
65.
What is the ideal mechanical advantage of this pulley system?
a)
2
b)
3
c)
4
d)
5
66.

Convert 35⁰F to Celsius (5/9 x (0F - 32))

a)

1.6⁰

b)

1.7⁰C

c)

2.0⁰

d)

16.6⁰C

67.

Convert 30°C to Fahrenheit (1.8 x 0C) + 32

a)

860°F

b)

86°F

c)

63.8°F

d)

56°F

68.

100 Celsius is ? Kelvin (K = Celsius + 273)

a)

173 K

b)

373K

c)

273 K

d)

0 K

69.

A day is equivalent to 8.64 X 104 seconds. When written in standard form, it is ___________.

a)

Eight and sixty-four hundredths times ten to the fourth power

b)

864 X 101 seconds

c)

86,400 seconds

d)

864 seconds

70.

What is Hydraulics a study of ?

a)

The movement of gases that convert fluid energy to mechanical energy

b)

The movement of oil that converts fluid energy into mechanical energy.

c)

The movement of solids within a liquid.

d)

All of the above

71.

What is the formula for calculating Force ?

a)

Density v Volume

b)

Length x Width

c)

3.142 x Atmospheric pressure

d)

Pressure x Area

72.

Which one of the following is an example of a hydraulically operated machine?

a)

A wheel barrow

b)

A laptop computer

c)

A bulldozer

d)

A vacuum cleaner

73.

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

74.

It's very easy to add what to a hydraulic system?

a)

Force multiplication

b)

Force whole numbers

c)

Force square roots

d)

Force perimeter

75.

Hydraulics is branch of science and engineering concerned with the use of liquids to perform___________

a)

Electrical task

b)

Magnetic task

c)

Mechanical task

d)

Electronic task

76.

Hydraulic systems use ____________ to transfer force from one point to another.

a)

Liquid

b)

Solid

77.

What does the subject of pneumatics study ?

a)

The study of converting wind energy into electrical energy

b)

The study of compressed gas energy converting to mechanical energy

c)

The study of liquid energy converting to mechanical energy.

d)

Non of the above

78.

In Pneumatics what medium is used to transmit power?

a)

Water

b)

Oil

c)

Gears

d)

Gas

79.
According to the graph how fast does the person travel in the first 5 seconds?
a)
2 m/s
b)
10 m/s
c)
12.5 m/s
d)
1 m/s
80.
Acceleration of an object happens when things ________
a)
slow down
b)
go faster
c)
change direction (turn)
d)
All of the above

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