Student ___________________________
Class ____________
4)
1)
An object is thrown upward
with a speed of 12 m/s on
the surface of planet X
where the acceleration due
to gravity is 1.5 m/s2. What
is the maximum height
reached by the object?
A) 144 m
B) 8.0 m
C) 18 m
D) 48 m
1)
5)
2)
3)
An object is thrown upward
with a speed of 12 m/s on
the surface of planet X
where the acceleration due
to gravity is 1.5 m/s2. How
long does it take for the
object to reach the
maximum height?
A) 8.0 s
B) 16 s
C) 14 s
D) 11 s
An object is thrown upward
with a speed of 15 m/s on
the surface of planet X
where the acceleration due
to gravity is 2.5 m/s2. How
long does it take for the
object to return to where it
is thrown?
A) 12 s
B) 10 s
C) 6.0 s
D) 8.0 s
2)
Date ___________
An object is thrown upward
with a speed of 14 m/s on
the surface of planet X
where the acceleration due
to gravity is 3.5 m/s2. What
is the speed of the object
after 8.0 s?
A) 14 m/s
B) 21 m/s
C) 7.0 m/s
D) 64 m/s
A ball is thrown upward at
a velocity of 19.6 m/s. What
is its velocity after 3.00 s?
4)
5)
A) zero
B) 9.8 m/s upward
C) 19.6 downward
D) 9.8 m/s downward
6)
3)
7)
1
A bullet shot straight up
returns to its starting point
in 10 s. What is the initial
speed of the bullet?
A) 25 m/s
B) 49 m/s
C) 9.8 m/s
D) 98 m/s
A ball is thrown downward
from the top of a building
with an initial speed of 25
m/s. It strikes the ground
after 2.0 s. How high is the
building?
A) 50 m
B) 70 m
C) 30 m
D) 20 m
6)
7)
8)
9)
10)
A ball is thrown upwards
and caught when it comes
back down. In the absence
of air resistance, the speed
of the ball when caught
would be __________.
A) the same as the speed it
had when thrown
upwards.
B) more than the speed it
had when thrown
upwards.
C) less than the speed it
had when thrown
upwards.
8)
Suppose an object is in free
fall. Each second the object
falls __________.
A) the same distance as in
the second before.
B) with the same
instantaneous speed.
C) a larger distance than
in the second before.
D) with the same average
speed.
9)
If you drop a feather and a
coin at the same time in a
tube filled with air, which
will reach the bottom of the
tube first?
A) The coin
B) Neither-they will both
reach the bottom at the
same time.
C) The feather
10)
Answer the following questions on a separate
sheet of paper. Show all work.
2
11)
A crate falls from an
airplane flying
horizontally at an
altitude of 2,000 m.
Neglecting air drag,
how long will the
crate take to strike
the ground?
11)
12)
A stone is dropped
from a cliff. After it
has fallen 40 m, what
is the stoneʹs
velocity?
12)
13)
A baseball is hit nearly straight up
into the air with a speed of 22 m/s. (a)
How high does it go? (b) How long is
it in the air?
14)
A ball is thrown straight up with a
speed of 30 m/s.
(a.) How long does it take the ball to
reach the maximum height?
(b.) What is the maximum height
reached by the ball?
(c.) What is its speed after 4.2 s?
15)
A foul ball is hit straight up into the
air with a speed of 30.0 m/s.
(a.)
Calculate the time required for
the ball to rise to its maximum height.
(b.)
Calculate the maximum height
reached by the ball.
(c.) Determine the time at which the
ball pass a point 25.0 m above the
point of contact between the bat and
ball.
(d.) Explain why there are two
answers to part c.
17)
FIGURE 16
16)
A stone is thrown vertically upward
with a speed of 12.0 m/s from the
edge of a cliff 70.0 m high (Fig. 16).
(a) How much later does it reach the
bottom of the cliff? (b) What is its
speed just before hitting? (c) What
total distance did it travel?
3
A stone is thrown vertically upward
with a speed of 18.0 m/s. (a) How fast
is it moving when it reaches a height
of 11.0 m? (b) How long is required
to reach this height? (c) Why are
there two answers to (b)?
Answer Key
Testname: FREE_FALL_SUB
1)
2)
3)
4)
5)
6)
7)
8)
9)
10)
D
A
A
A
D
B
B
A
C
A
20.0 s
12) 28 m/s
11)
13) (a) 25 m
(b) 4.5 s
14) (a.) 3.1 s
(b.) 46 m
(c.) 11 m/s
15) (a.) 3.06 s
(b.) 45.9 m
(c.) 0.995 s and 5.13 s
(d.) One value for the ball traveling upward; one
value for the ball traveling downward.
16) (a) 5.20 s
(b) 38.9 m/s
(c) 84.7 m
17) (a) 10.4 m/s
(b) 0.775 s, 2.90 s
(c) There are two times at which the stone reaches
that heightonce on the way up and once on the way
down.
4