Gravity Review

Front

What is gravitational potential energy (GPE)?

Back

Gravitational potential energy (GPE) is the energy an object possesses due to its position in a gravitational field, calculated as GPE = mass × gravity × height.

Front

How does height affect gravitational potential energy?

Back

The higher an object is above the ground, the greater its gravitational potential energy, as GPE increases with height.

Front

What factors affect the force of air resistance on an object?

Back

The force of air resistance depends on the object's surface area and speed.

Front

What is terminal velocity?

Back

Terminal velocity is the constant speed an object reaches when the force of air resistance equals the force of gravity, resulting in no net acceleration.

Front

What is the normal force?

Back

The normal force is the support force exerted upon an object that is in contact with a surface, acting perpendicular to the surface.

Front

How do you calculate the weight of an object?

Back

Weight is calculated using the formula: Weight = mass × gravity (W = m × g), where g is approximately 9.8 m/s² on Earth.

Front

What is the weight of a 50kg object?

Back

Weight = 50kg × 9.8m/s² = 490N.

Front

What happens to the forces acting on an object at terminal velocity?

Back

At terminal velocity, the forces of air resistance and gravity cancel each other out, resulting in no net force.

Front

What is the relationship between mass and weight?

Back

Weight is the force exerted by gravity on an object's mass; weight increases with mass.

Front

What is the formula for calculating gravitational potential energy?

Back

GPE = mass × gravity × height.