7th Grade 1st Semester Final Exam Part 2

Front

What role does surface roughness play in friction?

Back

It creates bumps that interact and resist motion.

Front

What does 'g' represent in the formula for gravitational potential energy (PE=mgh)?

Back

Gravity's constant.

Front

What is the relationship between force and acceleration?

Back

More force causes more acceleration.

Front

What is the mathematical relationship between kinetic energy and speed?

Back

Kinetic energy is proportional to speed squared.

Front

What happens to the gravitational potential energy of an object when it is lifted to a higher position?

Back

It increases.

Front

Define friction.

Back

Friction is the resistance that one surface or object encounters when moving over another.

Front

What is gravitational potential energy?

Back

Gravitational potential energy is the energy an object possesses due to its position in a gravitational field.

Front

State the formula for kinetic energy.

Back

Kinetic energy (KE) = 1/2 mv², where m is mass and v is velocity.

Front

What is the effect of increasing mass on gravitational potential energy?

Back

Increasing mass increases gravitational potential energy.

Front

Explain the concept of acceleration.

Back

Acceleration is the rate of change of velocity of an object.