SPH3U Exam Review

1. Which of the following quantities is a scalar?

A. acceleration B. force C. velocity D. work

1. Which of the following quantities is a scalar?

A. acceleration B. force C. velocity *D. work

2. Mr. Newton walks 1.0 km [N] and 1.0 km [E]. His displacement is:

A. 1.0 km [NE] B. 1.4 km [NE] C. 2.0 km [NE] D. impossible to determine

2. Mr. Newton walks 1.0 km [N] and 1.0 km [E]. His displacement is:

A. 1.0 km [NE] *B. 1.4 km [NE] C. 2.0 km [NE] D. impossible to determine

3. A jogger runs 400 m completely around a track in 80 s. Her average velocity is:

A. zero B. 0.2 m/s C. 5 m/s D. impossible to determine

3. A jogger runs 400 m completely around a track in 80 s. Her average velocity is:

*A. zero B. 0.2 m/s C. 5 m/s D. impossible to determine

4. Snail A is travelling at 0.001 m/s [E] toward Snail B, travelling at 0.001 m/s [W]. What is the velocity of Snail A relative to Snail B?

A. zero B. 0.001 m/s [E] C. 0.002 m/s [E] D. 0.002 m/s [W]

4. Snail A is travelling at 0.001 m/s [E] toward Snail B, travelling at 0.001 m/s [W]. What is the velocity of Snail A relative to Snail B?

A. zero B. 0.001 m/s [E] *C. 0.002 m/s [E] D. 0.002 m/s [W]

5. (km/h)/s are units of:

A. acceleration B. displacement C. force D. velocity

5. (km/h)/s are units of:

*A. acceleration B. displacement C. force D. velocity

6. Mr. Newton is driving at 20 m/s [N] when he hits the brakes and comes to a complete stop in 10 s. His acceleration while he is braking is:

A. 0 B. 2 m/s2 [N] C. 2 m/s2 [S] D. It cannot be determined.

6. Mr. Newton is driving at 20 m/s [N] when he hits the brakes and comes to a complete stop in 10 s. His acceleration while he is braking is:

A. 0 B. 2 m/s2 [N] *C. 2 m/s2 [S] D. It cannot be determined.

8. An object with an initial velocity of 4.0 m/s [N] is accelerated at 2.0 m/s2 [S] for 2.0 s. What is the final velocity of the object?

A. 4.0 m/s [S] B. 8.0 m/s [N] C. 8.0 m/s [S] D. zero

8. An object with an initial velocity of 4.0 m/s [N] is accelerated at 2.0 m/s2 [S] for 2.0 s. What is the final velocity of the object?

A. 4.0 m/s [S] B. 8.0 m/s [N] C. 8.0 m/s [S] *D. zero

9. A ball is dropped from some height. Neglecting air resistance, while the ball is falling, the magnitude of its velocity increases and the magnitude of its acceleration:

A. increases B. decreasesC. is zero D. is a non-zero constant

9. A ball is dropped from some height. Neglecting air resistance, while the ball is falling, the magnitude of its velocity increases and the magnitude of its acceleration:

A. increases B. decreasesC. is zero *D. is a non-zero constant

On the surface of the moon, the acceleration due to gravity is 1.6 m/s2 [down]. If an astronaut standing on the surface of the moon throws a tennis ball up into the air, the tennis ball will take _________ time to come down compared to the time it would take on Earth.

A. less B. more C. the same D. It would not come down.

On the surface of the moon, the acceleration due to gravity is 1.6 m/s2 [down]. If an astronaut standing on the surface of the moon throws a tennis ball up into the air, the tennis ball will take _________ time to come down compared to the time it would take on Earth.

A. less *B. more C. the same D. It would not come down.

A ball rolls down an incline as shown in the diagram at right. Describe what is happening to the velocity and the acceleration of the ball as it is rolling.

A ball rolls down an incline as shown in the diagram at right. Describe what is happening to the velocity and the acceleration of the ball as it is rolling.

The velocity increases.The acceleration decreases.

Mr. Newton walked around a lecture table as shown in the diagram at right. Explain why the question, “How far did he go?” is ambiguous.

“How far” could refer either todistance travelled (6 m) or themagnitude of the displacement(2 m)

A vehicle with an initial velocity of 24 m/s [N] brakes and stops in 5.0 s.

(a) What is the acceleration of the vehicle?

(b) What is the displacement of the vehicle during those 5.0 s?

A vehicle with an initial velocity of 24 m/s [N] brakes and stops in 5.0 s.

(a) What is the acceleration of the vehicle?

?

0.5

0

24

2

1

a

st

v

v

sm

sm

][8.4

8.40.5

240

2

2

12

Sor

sa

t

vva

sm

sms

msm

(b) What is the displacement of the vehicle during those 5.0 s?

?

0.5

0

24

2

1

a

st

v

v

sm

sm

][100.6

100.60.52

024

22

1

1

2121

Nmor

msd

tvv

dt

dvv

sm

sm

An object is dropped off the roof of a building. If the building is 65 m tall,

(a) how long does it take the object to hit the ground and

(b) what is the velocity of the object when it hits the ground?

An object is dropped off the roof of a building. If the building is 65 m tall,

(a) how long does it take the object to hit the ground?

?

65

8.9

0

2

1

t

md

a

v

sm

sm

s

mt

vfora

dttatvd

sm

6.38.9

652

02

2

12

21

1

(b) what is the velocity of the object when it hits the ground?

?

65

8.9

0

2

1

t

md

a

v

sm

sm

][

36658.920

22

2

22

212

21

22

down

mv

davvdavv

sm

sm

sm