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 do you calculate gravitational potential energy?

Back

GPE = mass (kg) × gravitational acceleration (9.8 m/s²) × height (m).

Front

What is the gravitational potential energy of a 4kg object 3 meters above the ground?

Back

117.6 J (calculated as 4 kg × 9.8 m/s² × 3 m).

Front

What happens to the gravitational potential energy if the height of an object is doubled?

Back

The gravitational potential energy also doubles, as it is directly proportional to height.

Front

What is the difference between weight and mass?

Back

Mass is the amount of matter in an object (measured in kg), while weight is the force exerted by gravity on that mass (measured in Newtons).

Front

What is the formula for weight?

Back

Weight = mass × gravitational acceleration (W = m × g).

Front

If an object has a mass of 10 kg, what is its weight on Earth?

Back

Weight = 10 kg × 9.8 m/s² = 98 N.

Front

What does it mean for forces to be balanced?

Back

Balanced forces occur when the net force acting on an object is zero, resulting in no change in motion.

Front

What happens to the forces acting on an object moving at constant speed?

Back

The forces acting on the object are balanced.

Front

What occurs when an elevator accelerates downward?

Back

The normal force acting on you is less than your weight (Weight > Normal force).