AP Physics 1 Work/Energy Review

Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object due to its motion, calculated using the formula: KE = \frac{1}{2}mv^2, where m is mass and v is velocity.

Front

What happens to kinetic energy when an object is thrown upward?

Back

The kinetic energy decreases as the object rises due to the conversion of kinetic energy into potential energy until it reaches its highest point.

Front

What is potential energy?

Back

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

Front

How does friction affect kinetic energy?

Back

Friction converts kinetic energy into thermal energy, causing a decrease in the kinetic energy of moving objects.

Front

What is the principle of conservation of energy?

Back

The principle states that energy cannot be created or destroyed, only transformed from one form to another, such as from potential energy to kinetic energy.

Front

What is the formula for work done by a force?

Back

Work done (W) is calculated as W = Fd cos(θ), where F is the force applied, d is the distance moved in the direction of the force, and θ is the angle between the force and the direction of motion.

Front

What is the relationship between work and energy?

Back

Work done on an object results in a change in its energy. If work is done on an object, its kinetic or potential energy increases.

Front

What is the coefficient of kinetic friction?

Back

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

Front

How do you calculate the speed of an object at the bottom of a hill?

Back

The speed can be calculated using energy conservation: v = \sqrt{2gh}, where g is acceleration due to gravity and h is the height of the hill.

Front

What is negative work?

Back

Negative work occurs when the force applied on an object is in the opposite direction of the object's displacement, resulting in a decrease in the object's energy.