Energy Big Review

Front

What is gravitational potential energy (GPE)?

Back

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

Front

What is kinetic energy (KE)?

Back

Kinetic energy is the energy an object has due to its motion, calculated as KE = 1/2 mv^2, where m is mass and v is velocity.

Front

What is the principle of conservation of mechanical energy?

Back

The principle states that in the absence of non-conservative forces (like friction), the total mechanical energy (kinetic + potential) of an object remains constant.

Front

How does height affect gravitational potential energy?

Back

Gravitational potential energy increases with height; as an object is raised higher in a gravitational field, its potential energy increases.

Front

What happens to kinetic energy as an object falls?

Back

As an object falls, its gravitational potential energy is converted into kinetic energy, increasing its speed and thus its kinetic energy.

Front

What is the relationship between height and speed at the bottom of a hill for a roller coaster?

Back

Front

What is the formula for calculating kinetic energy?

Back

Front

What is the effect of air resistance on falling objects?

Back

Air resistance opposes the motion of falling objects, reducing their acceleration and affecting their kinetic energy compared to free fall.

Front

What is the significance of point A in a potential energy graph?

Back

Point A typically represents the highest point in a potential energy graph, where the object has maximum gravitational potential energy and zero kinetic energy.

Front

How do you determine the position with the most potential energy?

Back

The position with the most potential energy is the highest point in a system, where the object is elevated against the force of gravity.