The following factors affects the gravitational potential energy of an object above Earth’s surface EXCEPT_____?

• Acceleration due to gravity

• Mass of the object

• Shape of the object

• Height / distance

Pendulum is an example of what angular momentum?

• Rotating point mass

• Orbital Angular Momentum

• Rotating rigid body

• Rotating angular momentum

Two objects with masses m₁ and m₂ are placed at distances r₁ and r₂ of planet with a mass M. If r₂ > r₁, what can be said about their gravitational potential energies?

• U1 < U2

• U1 > U2

• U1 = U2

• None of these

How does Newton’s Law of Gravitation relate to Kepler’s Third Law?

• Newton’s Law contradicts Kepler’s Third Law

• Newton’s Law explains the elliptical shape of the orbits.

• Newton’s law is only applicable to objects on Earth, not to celestial bodies.

• Newton’s Law provides the force necessary for the planets to follow Kepler’s Third Law

During an inelastic collision, when two objects collide and stick together, what is the total kinetic energy of the system after collision compare to before collision?

• Less after collision

• Greater after collision

• Equal after collision

• Zero after collision

If the distance between two masses is increased to three times its original value, the gravitational force between them will be _____.

• One-third of the original force

• Three times the original force

• One-ninth of the original force

• Nine times the original force

The total force experienced by an object is equal to zero. Therefore, the object ______.

• is in equilibrium state

• has balance forces

• in equal distribution of force

• All of the above

If an ice skater spinning in one foot extends her arms, her moment of inertia will _____ and her angular velocity will _____.

• increase

• decrease

• increase, decrease

• decrease, increase

• Amplitude

• Angular frequency

• Wavelength

• Wave speed

The coefficient of restitution is equal to zero when this type of collision occurs.

• Elastic

• Inelastic

• Perfectly elastic

• Perfectly inelastic