Energy and Momentum Review

Front

What is gravitational potential energy?

Back

Gravitational potential energy is the energy an object possesses due to its position in a gravitational field, calculated as PE = mgh, where m is mass, g is the acceleration due to gravity, and h is height.

Front

How do you calculate gravitational potential energy?

Back

PE = mgh, where PE is potential energy, m is mass in kilograms, g is the acceleration due to gravity (approximately 9.81 m/s²), and h is height in meters.

Front

At which point on a roller coaster is gravitational potential energy at its maximum?

Back

At the highest point of the roller coaster.

Front

What is momentum?

Back

Momentum is the product of an object's mass and its velocity, represented as p = mv, where p is momentum, m is mass, and v is velocity.

Front

What is the principle of conservation of momentum?

Back

The principle states that in a closed system, the total momentum before and after a collision remains constant.

Front

What are elastic and inelastic collisions?

Back

Elastic collisions conserve both momentum and kinetic energy, while inelastic collisions conserve momentum but not kinetic energy.

Front

What unit is used to measure power?

Back

Watts (W) is the unit of power, defined as one joule per second.

Front

How do you calculate power?

Back

Power is calculated as the work done divided by the time taken, P = W/t, where P is power, W is work in joules, and t is time in seconds.

Front

What is the formula for work done?

Back

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

Front

How do you calculate the power output of a motor?

Back

Power output can be calculated using the formula P = Fd/t, where P is power, F is force, d is distance, and t is time.