• #### 1.  Which object listed below has the greatest momentum?

• A 0.05 kg object rolling at 0.2 m/s.
• A 0.15 kg object rolling at 2 m/s.
• A 0.15 kg object rolling at 1 m/s
• A 0.4 kg object rolling at 2 m/s.

• size
• price
• mass
• position

• A
• G
• D
• C
• #### 4.  Work is ____________________ .

• hard to find
• boring
• a change in the universe made by energy
• never fun
• #### 5.  Why is a choked-up batter easier to swing fast than one at the knob?

• The bat distance from the center ( axis) of rotation is longer which decreases rotational inertia
• The bat distance from the center (axis) of rotation is longer which increases RPMs
• the bat distance from the center ( axis) of rotation is shorter which decreases rotational inertia
• the bat distance from the center (axis) of rotation is longer which increases Torque

• Gravity
• Force

• mass
• force
• velocity
• acceleration
• #### 8.  A person sits on a freely spinning lab stool that has no friction in its axle. When this person extends her arms,

• her moment of inertia increases and her angular speed decreases.
• her moment of inertia decreases and her angular speed increases.
• her moment of inertia increases and her angular speed increases.
• her moment of inertia increases and her angular speed remains the same.

• 9.4 m/s
• 6.8 m/s
• 11.7 m/s
• 3.5 m/s
• #### 10.  When this girl lets go of her string, what happens to the ball?

• it flies straight due to law of inertia
• it flies straight due to law of centripetal force
• it curves due to rotational inertia
• it curves due to its tangential speed

• 5 m/s2
• 17.63 m/s2
• 10 m/s2
• 8.81 m/s2
• #### 12.  Which forms of energy are present for objects rolling down an incline?

• Gravitational potential energy
• Rotational kinetic energy
• Kinetic energy
• All of above
• #### 13.  The time required for one complete revolution is:

• torque
• frequency
• period
• rotational kinetic energy

• Shape
• Speed
• Mass

• J
• m/s2
• kg⋅m/s
• N
• #### 16.  The number of complete revolutions per second is:

• frequency
• period
• torque
• rotational inertia

• K=1/2mw2
• k=1/2Iw2
• k=1/2Iv2
• k=1/2mv2
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