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Friction and Motion

Total questions: 50

Worksheet time: 8hrs 20mins

Name
Class
Date
1.
The unit for distance is:
a)

m

b)

s

c)

m/s

2.
The unit for time is:
a)
s
b)
m
c)
m/s
3.
The unit for speed is:
a)
m/s
b)
s
c)
m
d)
km
4.
What is the equation to calculate distance?
a)
distance = speed/time
b)
distance = time/speed
c)
distance = speed/distance
d)
distance = speed x time 
5.
What is the equation to calculate time?
a)
time = speed/distance
b)
time = distance/speed 
c)
time = speed x distance 
d)
time = distance x speed
6.

What is the speed of a car travelling 50m in 4s?

a)

200 m/s

b)

12.5 m/s

c)

12.5 m

d)

200m

7.

How far does a lorry move if it is travelling at 12m/s for 180s?

a)

2160 m

b)

0.06 m

c)

15 m

d)

21.6 m

8.

How long does it take a car to travel 40m at 12m/s?

a)

4.8 s

b)

480 s

c)

3.33 s

d)

33.3 s

9.

What is the speed of a car that travels 0.5 km in 1 min?

a)

0.5 m/s

b)

8.33 m/s

c)

0.008 m/s

d)

500 m/s

10.

How far does a truck move if it's travelling at 15m/s for 20 min?

a)

18000 m

b)

300 m

c)

0.75 m

d)

180 km

11.

How long does it take to travel a distance of 2 km at a speed of 16 m/s?

a)

32 s

b)

32000 s

c)

0.125 s

d)

125 s

12.

The team of 8 rowers row 500 m in 180 s. If they keep going at the same speed, how long does it take them to row 2 km?

a)

2.78 s

b)

12 min

c)

725 s

d)

90000 s

13.

the unit of acceleration is

a)

(m/s2)

b)

jouls

c)

m

d)

s

14.

A negative acceleration means that your object is  

a)

constant

b)

speeding up

c)

at rest

d)

slowing down

15.

A positive acceleration means that your object is

a)

at rest

b)

speeding up

c)

moving

d)

slowing down

16.

When is an object under uniform acceleration?

a)

none of the following

b)

when the direction is straight

c)

when the velocity change is constant per unit time

d)

when the time is constant

17.

A bus starts from rest and accelerates to 14 m/s in 4 s. What is the average acceleration of the bus?

a)

3.5 m/s2

b)

5.9 m/s2

c)

10.5 m/s2

d)

24 m/s2

18.

1. Change in speed = 14 m/s; time taken = 2 seconds. The acceleration is....

a)

6 m/s2

b)

7 m/s

c)

7m/s2

d)

6 m/s

19.

A cyclist in the Tour de France accelerates down a hill from 22 m/s to a speed of 37 m/s. This acceleration takes him 2 seconds. The acceleration is...?

a)

7.5 m/s2

b)

11 m/s2

c)

18.5 m/s2

d)

44 m/s2

20.

To calculate the acceleration we use the formula.....

a)

a=Δvta=\frac{\Delta v}{t}

b)

a=Δdta=\frac{\Delta d}{t}

c)

a=Δv×ta=\Delta v\times t

d)

a=tΔva=\frac{t}{\Delta v}

21.

1. If a Ferrari accelerates at a rate of 50 m/s2 for 3 seconds, what will its change in velocity be?

a)

50 m/s

b)

53 m/s

c)

16.67 m/s

d)

150 m/s

22.

To calculate the time that a change in speed needed to take happen for a certain acceleration rate we use the formula.....

a)

t=Δv×tt=\Delta v\times t

b)

t=Δvat=\frac{\Delta v}{a}

c)

t=Δv×at=\Delta v\times a

d)

t=aΔvt=\frac{a}{\Delta v}

23.

To calculate the change in speed if we know the acceleration and the time it was accelerating for  we use the formula.....

a)

Δv=at\Delta v=\frac{a}{t}

b)

Δv=ta\Delta v=\frac{t}{a}

c)

Δv=a×t\Delta v=a\times t

24.

A horse accelerates from 5 m/s to 10 m/s with acceleration of 2 m/s2. For how many seconds did it accelerate for?

a)

20 s

b)

10 s

c)

5 s

d)

2.5 s

25.

Which runner stopped for a rest?

a)

Albert

b)

Bob

c)

Charlie

26.

What is happening between 2 and 3 seconds?

a)

The object is not moving.

b)

The object is not accelerating.

c)

The object is slowing down.

d)

The object is speeding up.

27.

What is happening between 3 seconds and 4 seconds?

a)

The object is moving in a negative direction.

b)

The object is returning to its starting position.

c)

The object is slowing to a stop.

d)

The object is changing direction.

28.

During which interval is the object traveling at a constant velocity?

a)

B to C

b)

D to E

c)

F to G

d)

All of the above

29.

During which intervals is the object speeding up?

a)

A to B

b)

B to C

c)

D to E

d)

G to H

30.

This distance-time graph shows an object that is

a)

Accelerating

b)

Moving with constant speed

c)

Decelerating

d)

Stationary

31.

This distance-time graph shows an object that is

a)

Increasing speed away from the start

b)

Moving away from the start at a constant speed

c)

Decreasing speed toward the start

d)

Moving toward the start at a constant speed

32.

This distance-time graph shows an object that is

a)

Increasing speed toward the start

b)

Moving away from the start at a constant speed

c)

Decreasing speed away from the start

d)

Moving toward the start at a constant speed

33.
Which line represents an object moving at a faster speed?
a)
A
b)
B
34.
Which line represents an object moving at a slower speed?
a)
A
b)
B
35.

This speed-time graph shows an object that is

a)

Moving with constant speed

b)

Accelerating

c)

Decelerating

d)

Stationary

36.

This speed-time graph shows an object that is

a)

Moving with constant speed

b)

Accelerating

c)

Decelerating

d)

Stationary

37.

This speed-time graph shows an object that is

a)

Moving with constant speed

b)

Accelerating

c)

Decelerting

d)

Stationary

38.

This speed-time graph demonstrates an object that is

a)

Moving with constant speed

b)

Accelerating

c)

Decelerating

d)

Stationary

39.
Which graph represents the greatest acceleration?
a)
A
b)
B
c)
C
d)
D
40.
Which graph represents zero acceleration (constant velocity)?
a)
A
b)
B
c)
C
d)
D
41.

What is the velocity at 12.5 seconds?

a)

0 m/s

b)

2 m/s

c)

10 m/s

d)

20 m/s

42.

What is the displacement from 0-10 seconds?

a)

10 m

b)

10 m

c)

100 m

d)

200 m

43.

What is the acceleration during interval A?

a)

0 m/s/s

b)

2 m/s/s

c)

10 m/s/s

d)

20 m/s/s

44.

What is occurring on this graph?

a)

Negative acceleration

b)

moving at a constant speed in the positive direction

c)

positive acceleration

d)

negative net force

45.

Static Friction is present only when an object is at rest.

a)

True.

b)

False.

46.

A 2.0-N force acts horizontally on a 10-N block that is initially at rest on a horizontal surface. The coefficient of static friction between the block and the surface is 0.50.What is the magnitude of the frictional force that acts on the block?

a)

5 N

b)

8 N

c)

2 N

d)

0 N

47.

Static and kinetic friction can be present simultaneously.

a)

True

b)

False.

48.

The mass of a brick is 5kg, and it is stationary. What is the maximum static friction if the coefficient is 0.66?

a)

3.3

b)

33

c)

3.3N

d)

33N

49.

There are 25N of friction that keep a 10kg brick moving at a constant rate. What is the coefficient of friction?

a)

0.25

b)

0.25N

c)

4

d)

4N

50.
 What is the force of friction between a block of ice that weighs 950 N and the ground if μ = .12? 
a)
65 N
b)
226 N
c)
175 N
d)
114 N

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