AP Physics 1 Work/Energy Review

Front

What is the formula for power when lifting an object at a constant speed?

Back

Power (P) = Force (F) × Velocity (v) = Weight (mg) × Velocity (v) = Mgv, where M is mass, g is acceleration due to gravity, and v is velocity.

Front

What happens to kinetic energy (KE) as an object falls freely under gravity?

Back

Kinetic energy increases as the object falls, converting potential energy into kinetic energy.

Front

What is the condition for kinetic energy to decrease?

Back

Kinetic energy decreases when an object is moving against a force (like gravity) or when it is slowing down, such as a baseball thrown upwards.

Front

What is the principle of conservation of mechanical energy?

Back

In a closed system, the total mechanical energy (sum of potential and kinetic energy) remains constant if only conservative forces are acting.

Front

What is the formula for kinetic energy?

Back

Front

What is the relationship between work done and energy?

Back

Work done on an object is equal to the change in its energy. Work (W) = Force (F) × Distance (d) in the direction of the force.

Front

What is the coefficient of kinetic friction?

Back

The coefficient of kinetic friction (μk) is a dimensionless scalar that represents the ratio of the force of friction between two bodies and the force pressing them together.

Front

How does friction affect the motion of an object on an incline?

Back

Friction opposes the motion of the object, reducing its acceleration and converting some of its mechanical energy into thermal energy.

Front

What is gravitational potential energy?

Back

Gravitational Potential Energy (PE) = mgh, where m is mass, g is acceleration due to gravity, and h is height above a reference point.

Front

What is the effect of air resistance on falling objects?

Back

Air resistance acts against the motion of falling objects, reducing their acceleration and terminal velocity.