13. Mary spins a ball in a horizontal circle on a massless string. Karen has a similar ball but wants to spin hers faster. What could Karen do to make it easier to start spinning the mass from rest? a. Use a lighter ball b. Spin the ball on the moon c. Make the string longer d. Use a heavier ball 14. A 2.0 N force F is applied to a bar that can pivot around its end as shown below. The force is parallel to the bar and is r= 0.50 m away from the end. What is the torque on the bar? a. O Nm b. 1.0 Nm F c. -1.0 Nm d. 2.0 Nm
13. Mary spins a ball in a horizontal circle on a massless string. Karen has a similar ball but wants to spin hers faster. What could Karen do to make it easier to start spinning the mass from rest? a. Use a lighter ball b. Spin the ball on the moon c. Make the string longer d. Use a heavier ball 14. A 2.0 N force F is applied to a bar that can pivot around its end as shown below. The force is parallel to the bar and is r= 0.50 m away from the end. What is the torque on the bar? a. O Nm b. 1.0 Nm F c. -1.0 Nm d. 2.0 Nm
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Transcribed Image Text:13. Mary spins a ball in a horizontal circle on a massless string. Karen has a similar ball
but wants to spin hers faster. What could Karen do to make it easier to start spinning
the mass from rest?
a. Use a lighter ball
b. Spin the ball on the moon
c. Make the string longer
d. Use a heavier ball
14. A 2.0 N force F is applied to a bar that can pivot around its end as shown below.
The force is parallel to the bar and is r = 0.50 m away from the end. What is the
torque on the bar?
a. O Nm
F
b. 1.0 Nm
c. -1.0 Nm
d. 2.0 Nm
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