**Chapter 2 Review**

**Choose the best answer to each question and write the appropriate letter
in the space provided.**

1) As an object falls freely in a vacuum, its __________.

A) acceleration increases.

B) velocity increases.

C) both A and B

D) none of the above

*Write
True or False in the space provided.*

2) The SI unit of velocity is the meter.

3) The rate at which velocity changes with time
is called acceleration.

*On
a separate sheet of paper, answer the following questions.*

4) Write a short paragraph explaining the difference
between speed and velocity, and give examples of both.

*Choose
the best answer to each question and write the appropriate letter in
the space provided.*

5) One-half second after starting from rest, a
freely falling object will have a speed of about __________.

A) 10
m/s.

B) 20 m/s.

C) 5 m/s.

D) 2.5 m/s.

E) none of the above

6) An object travels 8 meters in the first second of travel, 8 meters again during the second second of travel,
and 8 meters again during the
third second. Its acceleration is __________.

A) 32
m/s to power of (2).

B) 8 m/s to power of (2).

C) 0
m/s to power of (2).

D) 16
m/s to power of (2).

E) none of the above

7) A ball is thrown straight up. At the top of
its path its instantaneous speed is __________.

A) 0 m/s.

B) about 10 m/s.

C) about 5 m/s.

D) about 50 m/s.

E) about 20 m/s.

8) The vertical height attained by a basketball
player who achieves a hang time of a full
1 second is about __________.

A) 0.8 m.

B) 2.5 m.

C) 1 m.

D) more than 2.5
m.

E) 1.2 m.

*Write
True or False in the space provided.*

9) When we discuss the motion of something, its
motion is described relative to the motion of something else. ________

*Choose
the best answer to each question and write the appropriate letter in
the space provided.*

10) When a basketball player jumps to make a shot,
once the feet are off the floor, the jumper's acceleration __________.

A) is
usually greater for taller players (but not always).

B) depends on launch
speed.

C) varies with body
orientation.

D) depends on all
the above.

E) is g; no more,
no less.

11) Suppose you are in a car that is going around
a curve. The speedometer reads a constant
30 miles per hour. Which of the following is NOT true?

A) Your
direction is constantly changing.

B) You and the car
are accelerating.

C) Your velocity
is constant.

D) Your acceleration
is constant.

E) Your speed is
constant.

12) One possible unit of speed is __________.

A) kilometers per
hour.

B) miles per hour.

C) light years per
century.

D) all of the above.

E) none of the above.

*Answer
the following questions in the space provided. Show all work. *

13) If a projectile fired beneath the water, straight
up, breaks through the surface at a speed of 16 m/s, to what height above the water will
it ascend?

*Write
True or False in the space provided.*

14) When a car rounds a corner at a constant speed,
its acceleration is zero. _______

*Choose
the best answer to each question and write the appropriate letter in
the space provided.*

15) Acceleration is defined as the CHANGE in __________.

A) distance
divided by the time interval.

B) velocity divided
by the time interval.

C) time it takes
to move from one place to another place.

D) velocity of an
object.

E) time it takes
to move from one speed to another speed.

*Answer
the following questions in the space provided. Show all work. *

16) A skateboarder starting from rest accelerates
down a ramp at 4.0 m/s to power
of (2)for 4.0 s. What is the
final speed of the skateboarder?

*Write
True or False in the space provided.*

17) Average speed is defined as the time it takes
for a trip divided by the distance. _______

*Choose
the best answer to each question and write the appropriate letter in
the space provided.*

18) Suppose a car is moving in a straight line and
steadily increases its speed. It moves from
35 km/h to 40 km/h the
first second and from 40 km/h
to 45 km/h the next second. What is the car's acceleration?

A) 40 km/h\'97s

B) 45 km/h\'97s

C) 10 km/h\'97s

D) 5 km/h\'97s

E) 35 km/h\'97s

19) In the absence of air resistance, objects fall
at constant __________.

A) distances each successive second.

B) velocity.

C) speed.

D) acceleration.

E) all of the above

*Answer
the following questions in the space provided. Show all work. *

20) A stone is dropped from a cliff. After it has
fallen 40 m, what is the stone's
velocity? _____________

21) An apple falls from a tree and 0.5 second later hits the ground. How fast is
the apple falling when it hits the ground? _____________

*Write
True or False in the space provided.*

22) Even though a car is slowing down, it is still
accelerating, in the most general definition of acceleration. _______

23) Velocity is different from speed in that velocity
is speed in a given direction. _______

*Answer
the following questions in the space provided. Show all work. *

24) You toss a ball at 30.0 m/s straight upward. How much time will
the ball take to reach the top of its path? _____________

25) What vertical distance can a person with a
0.8-s hang time jump? _____________

26) A jet on an aircraft carrier can be launched
from 0 to 50 m/s in 2.0 seconds. What is the acceleration of the
jet? _____________

*Choose
the best answer to each question and write the appropriate letter in
the space provided.*

27) Suppose a jumper claims a hang time of 2 seconds. Then that jumper must be able to
jump a vertical distance of __________.

A) 2 m.

B) 5 m.

C) 4 m.

D) 1 m.

E) 3 m.

*Answer
the following questions in the space provided. Show all work. *

28) What speed must you toss a ball straight up
so that it takes 4.0 s to return
to you? _____________

29) Starting from rest, a car undergoes a constant
acceleration of 6.0 m/s2. How
far will the car travel in the first second? _____________

*On
a separate sheet of paper, answer the following questions.*

30) Write a short paragraph on how fast things fall
on earth. Compare this to motion on the moon, where the acceleration
due to gravity is about 1.6 m/s
to power of (2).