Section 6.2
Circular Motion
Practice Test
1.
If an object moves in a circle at steady speed it is in __________.
a.
torque
b.
equilibrium
c.
uniform circular motion
d.
projectile motion
Hint
2.
A carnival ride has a 3.0-m radius and rotates once every 1.7 s. What is the speed of the rider?
a.
3.4 m/s
b.
5 m/s
c.
9.4 m/s
d.
11 m/s
Hint
3.
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.
33 m/s
2
b.
4.5 m/s
2
c.
22 m/s
2
d.
3.0 m/s
2
Hint
4.
A carnival ride has a 3.0-m radius and rotates once every 1.7 s. Find the centripetal acceleration of a rider.
a.
82 m/s
2
b.
98 m/s
2
c.
41 m/s
2
d.
11 m/s
2
Hint
5.
The acceleration of an object in uniform circular motion is called __________.
a.
range
b.
torque
c.
centripetal acceleration
d.
equilibrium
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.
4.5 N
b.
3.0 N
c.
33 N
d.
22 N
Hint
7.
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 force of the chain on the thrower's hands?
a.
33 N, inward
b.
22 N, inward
c.
33 N, outward
d.
22 N, outward
Hint
