Physics Quiz on Gravity and Motion

What is the formula for the weight of an object near the Earth's surface?

• Gm1m2/r^2

• mgh

• mv^2/r

• mg

What is the gravitational constant G used for?

• Calculating weight

• Calculating potential energy near Earth's surface

• Calculating universal gravitational force

• Calculating centripetal force

What is the formula for gravitational force between two masses?

• Gm1m2/r^2

• mgh

• mv^2/r

• mg

What is the escape velocity?

• The speed needed to return to Earth

• The speed needed to orbit Earth

• The speed needed to escape Earth's gravity

• The speed needed to reach the moon

What happens to kinetic energy as an object reaches escape velocity?

• It remains constant

• It increases

• It decreases

• It becomes zero

What is the relationship between kinetic and potential energy in the context of escape velocity?

• Kinetic energy is always greater

• They are unrelated

• Potential energy is always greater

• They are equal at escape velocity

What happens to potential energy as an object moves infinitely far from Earth?

• It becomes zero

• It becomes infinite

• It decreases

• It increases

What force keeps a satellite in a stable circular orbit?

• Nuclear force

• Electromagnetic force

• Gravitational force

• Centripetal force

How does the mass of a satellite affect its speed in orbit?

• It increases speed

• It decreases speed

• It doubles the speed

• It has no effect

What is the formula for the speed of a satellite in a stable orbit?

• v = mgh

• v = GM/r^2

• v = mg

• v = sqrt(GM/r)