Energy Big Review

Front

What is work in physics?

Back

Work is defined as the product of the force applied to an object and the distance over which that force is applied in the direction of the force. It is measured in joules (J).

Front

What is the formula for calculating kinetic energy?

Back

Kinetic energy (KE) is calculated using the formula KE = 1/2 mv², where m is the mass of the object and v is its velocity.

Front

What is the principle of conservation of energy?

Back

The principle of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.

Front

What is potential energy?

Back

Potential energy is the energy stored in an object due to its position or configuration. For example, gravitational potential energy is given by PE = mgh, where m is mass, g is acceleration due to gravity, and h is height.

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 energy increases; if work is done by the object, its energy decreases.

Front

What is centripetal force?

Back

Centripetal force is the net force acting on an object moving in a circular path, directed towards the center of the circle. It is responsible for keeping the object in circular motion.

Front

What is the significance of the area under a force vs. displacement graph?

Back

The area under a force vs. displacement graph represents the work done on the object. It quantifies the energy transferred to or from the object.

Front

What does it mean for work to be positive, negative, or zero?

Back

Positive work means energy is added to the system, negative work means energy is taken from the system, and zero work means no energy transfer occurs.

Front

How does the net force affect an object's motion?

Back

The net force acting on an object determines its acceleration according to Newton's second law (F = ma). A greater net force results in greater acceleration.

Front

What is the formula for calculating gravitational potential energy?

Back

Gravitational potential energy (PE) is calculated using the formula PE = mgh, where m is mass, g is the acceleration due to gravity, and h is height above a reference point.