Practice Exam Unit 3

Front

What is the formula for calculating the potential energy stored in a spring?

Back

The potential energy (PE) stored in a spring is given by the formula: PE = 1/2 k x², where k is the spring constant and x is the displacement from the equilibrium position.

Front

What is momentum and how is it calculated?

Back

Momentum is the product of an object's mass and its velocity, calculated using the formula: p = m * v, where p is momentum, m is mass, and v is velocity.

Front

What is the principle of conservation of momentum?

Back

The principle of conservation of momentum states that the total momentum of a closed system remains constant if no external forces act on it.

Front

What is kinetic energy and how is it calculated?

Back

Kinetic energy (KE) is the energy of an object in motion, calculated using the formula: KE = 1/2 m v², where m is mass and v is velocity.

Front

What is elastic potential energy?

Back

Elastic potential energy is the energy stored in elastic materials as the result of their stretching or compressing.

Front

What is an inelastic collision?

Back

An inelastic collision is a type of collision where kinetic energy is not conserved, but momentum is conserved.

Front

How do you convert centimeters to meters?

Back

To convert centimeters to meters, divide the number of centimeters by 100.

Front

What happens to the total energy in a closed system?

Back

In a closed system, the total energy remains constant; it can change forms (e.g., from kinetic to potential) but is not lost.

Front

What is the relationship between force, mass, and acceleration?

Back

The relationship is described by Newton's second law: F = m * a, where F is force, m is mass, and a is acceleration.

Front

What is the difference between elastic and inelastic collisions?

Back

In elastic collisions, both momentum and kinetic energy are conserved. In inelastic collisions, only momentum is conserved.