Energy ACP Review

Front

What is work in physics?

Back

Work is defined as the product of force and the distance over which it is applied. It is measured in Joules (J).

Front

How do you calculate force using work and distance?

Back

Force (F) can be calculated using the formula: F = Work (W) / Distance (d).

Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object due to its motion, calculated using the formula: KE = 1/2 mv², where m is mass and v is velocity.

Front

What is potential energy?

Back

Potential energy is the stored energy of an object due to its position or state, commonly gravitational potential energy, calculated as PE = mgh, where m is mass, g is acceleration due to gravity, and h is height.

Front

What is the principle of conservation of mechanical energy?

Back

The principle states that in a closed system, the total mechanical energy (kinetic + potential) remains constant if only conservative forces are acting.

Front

How is total mechanical energy calculated?

Back

Total mechanical energy (TME) is calculated as the sum of kinetic energy (KE) and potential energy (PE): TME = KE + PE.

Front

What happens to kinetic energy as a pendulum swings to its highest point?

Back

As a pendulum swings to its highest point, kinetic energy is converted into potential energy.

Front

What is gravitational potential energy at a height of 2 meters for a 5 kg object?

Back

Gravitational potential energy (PE) is calculated as PE = mgh. For a 5 kg object at 2 m: PE = 5 kg * 9.8 m/s² * 2 m = 98 J.

Front

What is the relationship between height and potential energy?

Back

Potential energy increases with height; the higher an object is, the more potential energy it has.

Front

What is the formula for calculating kinetic energy just before an object hits the ground?

Back

Kinetic energy just before impact can be calculated using the formula: KE = mgh, where h is the height from which it fell.