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Chapter 2 Review
Choose the best answer to each question and write the appropriate letter
in the space provided.
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.
4) Write a short paragraph explaining the difference
between speed and velocity, and give examples of both.
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
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
A) 0 m/s.
B) about 10 m/s.
C) about 5 m/s.
D) about 50 m/s.
E) about 20 m/s.
A) 0.8 m.
B) 2.5 m.
C) 1 m.
D) more than 2.5
m.
E) 1.2 m.
9) When we discuss the motion of something, its
motion is described relative to the motion of something else. ________
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.
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.
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?
14) When a car rounds a corner at a constant speed,
its acceleration is zero. _______
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.
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?
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
A) distances each successive second.
B) velocity.
C) speed.
E) all of the above
20) A stone is dropped from a cliff. After it has
fallen 40 m, what is the stone's
velocity? _____________
22) Even though a car is slowing down, it is still
accelerating, in the most general definition of acceleration. _______
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? _____________
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.
28) What speed must you toss a ball straight up
so that it takes 4.0 s to return
to you? _____________
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).
