Energy, Work and Power

Which of the following statements about energy is correct?

• Energy can be destroyed.

• Energy is only found in moving objects.

• Energy can be transferred between different forms.

• Energy cannot be stored.

The gravitational potential energy of an object is calculated using the formula:
GPE = ___

The efficiency of a machine is the ratio of ​​ (a)   energy output to the ​ (b)   energy input.

• useful
• total
• input

Match the energy form to the correct description:

• Energy due to position in a field

• Gravitational potential Energy

• Energy due to motion

• Kinetic energy

• Energy stored in stretched or compressed objects

• Elastic potential energy

Which of the following are units of power?

• Watt

• Newton

• Joule/second

• Kilogram

Which energy conversion happens in a falling object (ignoring air resistance)?

• • Kinetic → Potential

• • Thermal → Chemical

• • Potential → Kinetic

• • Sound → Thermal

Which factor does NOT affect an object’s kinetic energy?

• Speed

• Direction

• Mass

• Height

Work is defined as the product of force and ______ in the direction of the force.

In an inelastic collision, ​ (a)   does not conserve but ​ (b)   does conserve.

• kinetic energy
• momentum
• mass
• gravitational potential energy

Match the scenario to the correct concept:

• Kinetic energy

• Work done over time

• Work done

• Product of force and displacement

• Power

• Energy of a moving object

• Thermal energy

• Energy lost due to friction