Motion in Two Dimensions
Practice Test
1.
The horizontal distance a projectile travels is the __________.
a.
trajectory
b.
maximum height
c.
range
d.
torque
Hint
2.
In Figure 6-7, if the mass of the hammer is 7.26 kg, its center is 0.50 m from the thrower, and it is moving at a speed of 1.5 m/s, what is its centripetal acceleration?
a.
4.5 m/s
2
b.
3.0 m/s
2
c.
33 m/s
2
d.
22 m/s
2
Hint
3.
Which of the following situations is physically the most like that depicted in Figure 6-9a?
a.
You slide to the right on the seat of a forward-moving bus.
b.
You walk toward the rear of a forward-moving train.
c.
You jump up in an elevator that is going down.
d.
You step upwards on an upward-moving escalator.
Hint
4.
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.
225 m
b.
135 m
c.
15 m
d.
45 m
Hint
5.
You are riding in a boat that is traveling 15.0 m/s in still water. You move from the bow to the stern at 3.0 m/s. What is your speed relative to the water?
a.
15.3 m/s relative to the water
b.
9.0 m/s relative to the water
c.
18.0 m/s relative to the water
d.
12.0 m/s relative to the water
Hint
6.
In Figure 6-7, if the mass of the hammer is 7.26 kg, its center is 0.50 m from the thrower, and it is moving at a speed of 1.5 m/s, what is the tension in the chain?
a.
3.0 N
b.
33 N
c.
4.5 N
d.
22 N
Hint
