WORK, ENERGY AND POWER

Gravitational potential energy depends on which of the following factors?

• Mass and speed

• Height and mass

• Speed and time

• Distance and direction

If an object has a gravitational potential energy of 200 J and is raised to twice its original height, what will be its new potential energy?

• 100 J

• 200 J

• 400 J

• 800 J

A 2 kg object is held 5 meters above the ground. What is the gravitational potential energy of the object?

• 5 J

• 10 J

• 20 J

• 100 J

If you want to double the gravitational potential energy of an object near the Earth's surface, what should you do?

• Double the object's mass.

• Double the object's height.

• Double the acceleration due to gravity.

• Double the object's speed.

The gravitational potential energy of an object is at its maximum when:

• The object is at rest.

• The object is at the lowest point.

• The object is at the highest point.

• The object is in motion.

If a 10 kg object falls freely from a height of 20 meters, what is its final kinetic energy just before it hits the ground?

• 100 J

• 200 J

• 400 J

• 2000 J

Elastic potential energy is stored in objects like springs when they are:

• At rest

• Compressed or stretched

• In motion

• Subjected to friction

In the formula for kinetic energy, what does "m" represent?

• Spring constant

• Acceleration due to gravity

• Mass of the object

• Height of the object

The kinetic energy of an object depends on which of the following factors?

• Its height above the ground

• Its mass and velocity

• Its volume

• Its color

Which unit is used to measure kinetic energy in the International System of Units (SI)?

• Joules

• Watts

• Newtons

• Volts