Conservation of Mechanical Energy

What happens to the pendulum's gravitational potential energy as it swings downward?

• It remains constant.

• It is converted into kinetic energy.

• It is lost to the surroundings.

• It increases.

If a pendulum has a mass of 1.5 kg and is raised to a height of 0.2 meters, what is its gravitational potential energy? (Assume g = 9.8 N/kg)

• 1.96 Joules

• 4.90 Joules

• 2.94 Joules

• 3.92 Joules

Which equation represents the gravitational potential energy of an object?

• KE = 1/2 × m × v²

• PE = 1/2 × k × x²

• GPE = m × g × h

• F = m × a

What is the initial kinetic energy of a ball with a mass of 0.5 kg thrown upwards at a velocity of 10 m/s?

• 10 Joules

• 50 Joules

• 25 Joules

• 100 Joules

How much energy is lost due to air resistance when a ball gains 22.05 Joules of gravitational potential energy but starts with 25 Joules of kinetic energy?

• 2.95 Joules

• 3.95 Joules

• 4.95 Joules

• 1.95 Joules