Unit 3 Work and Power Summative Review (no simple machines)

Front

What is the formula for calculating work?

Back

Work (W) = Force (F) × Distance (d) × cos(θ), where θ is the angle between the force and the direction of motion.

Front

Define kinetic energy.

Back

Kinetic energy is the energy an object possesses due to its motion, calculated as KE = 1/2 mv², where m is mass and v is velocity.

Front

What is potential energy?

Back

Potential energy is the energy stored in an object due to its position or configuration, commonly calculated as PE = mgh, where m is mass, g is acceleration due to gravity, and h is height.

Front

Explain the principle of conservation of energy.

Back

The principle of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.

Front

What is an elastic collision?

Back

An elastic collision is a collision in which both momentum and kinetic energy are conserved.

Front

What is an inelastic collision?

Back

An inelastic collision is a collision in which momentum is conserved, but kinetic energy is not.

Front

Define momentum.

Back

Momentum is the product of an object's mass and its velocity, expressed as p = mv.

Front

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

Back

According to Newton's second law, force (F) is equal to mass (m) multiplied by acceleration (a), expressed as F = ma.

Front

How does mass affect the outcome of a collision?

Back

In a collision, the object with greater mass will experience a smaller change in velocity compared to the object with lesser mass.

Front

What is the significance of the spring constant (k) in Hooke's Law?

Back

The spring constant (k) measures the stiffness of a spring; a higher k indicates a stiffer spring.