1. Which force provides the centripetal force for a satellite orbiting the earth

Question

1.     Which force provides the centripetal force for a satellite orbiting the earth?

a.     Friction

b.     Gravitation

c.     Non-conservative

d.     Electrostatic

2.     Which force provides the centripetal force for a stone tied to a string rotating vertically?

a.     Friction

b.     Gravitation

c.     Tension on string

d.     Conservative

3.     For an object to be in equilibrium:

a.     The net force should be zero but the net torque should be finite

b.     The net force should be zero and the net torque should be zero

c.     The net torque should be zero but the net force should be finite

d.     The net torque should be finite and the net force should be finite.

4.     Why is it easier to open a door when it is pushed/pulled by the doorknob than the hinge?

a.     More force can be applied at the doorknob

b.     The torque at the hinge is more than that at the doorknob for the same amount of force

c.     The torque at the doorknob is more than that at the hinge for the same amount of force

Which force provides the centripetal force for a satellite orbiting the earth? Friction Gravitation Non-conservative Electrostatic Which force provides the centripetal force for a stone tied to a string rotating vertically? Friction Gravitation Tension on string Conservative For an object to be in equilibrium: The net force should be zero but the net torque should be finite The net force should be zero and the net torque should be zero The net torque should be zero but the net force should be finite The net torque should be finite and the net force should be finite. Why is it easier to open a door when it is pushed/pulled by the doorknob than the hinge? More force can be applied at the doorknob The torque at the hinge is more than that at the doorknob for the same amount of force The torque at the doorknob is more than that at the hinge for the same amount of force

Explanation / Answer

1). Gravitation 2). Tension on string 3). The net force should be zero and the net torque should be zero 4). The torque at the doorknob is more than that at the hinge for the same amount of force

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