Section 6.1
Projectile Motion
Practice Test
1.
Any moving object that moves through the air only under the force of gravity (after initial thrust) is a(n) __________.
a.
projectile
b.
free floater
c.
vector
d.
satellite
Hint
2.
The __________ is the height of the projectile when the vertical velocity is zero.
a.
torque
b.
range
c.
trajectory
d.
maximum height
Hint
3.
A stone is thrown horizontally at 20 m/s from the top of a cliff 63 m high. How fast is it moving the instant before it hits the ground?
a.
38 m/s
b.
33 m/s
c.
40 m/s
d.
29 m/s
Hint
4.
The time a projectile is in the air is the __________.
a.
flight time
b.
range
c.
trajectory
d.
centripetal acceleration
Hint
5.
A projectile's path through space is called its __________.
a.
range
b.
flight plan
c.
trajectory
d.
period
Hint
6.
You accidentally throw your car keys horizontally at 5.0 m/s from a cliff 45 m high. How far from the base of the cliff should you look for your keys?
a.
135 m
b.
15 m
c.
225 m
d.
45 m
Hint
7.
In Figure 6-1, if the baseballs fell a vertical distance of 1.6 m from the first to the last image, how long did it take them to fall?
a.
0.40 s
b.
0.16 s
c.
0.57 s
d.
0.32 s
Hint
8.
A stone is thrown horizontally at 20.0 m/s from the top of a cliff 63 m high. How far from the base of the cliff does the stone hit the ground?
a.
13 m
b.
42 m
c.
66 m
d.
72 m
Hint
9.
In Figure 6-1, if the baseballs fell a vertical distance of 1.6 m from the first to the last image, what is the time interval between frames?
a.
0.071 s
b.
0.23 s
c.
0.081 s
d.
0.095 s
Hint
10.
The horizontal distance a projectile travels is the __________.
a.
maximum height
b.
range
c.
trajectory
d.
torque
Hint
