Chapter 3 Test Review

Front

What is the formula for calculating work done when a force is applied over a distance?

Back

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

Front

How do you calculate power in a physics context?

Back

Power (P) = Work (W) / Time (t). It measures the rate at which work is done.

Front

What are the units of power in the International System of Units (SI)?

Back

Watts (W), where 1 Watt = 1 Joule/second.

Front

What is the definition of force in physics?

Back

Force is an interaction that causes an object to change its velocity, measured in newtons (N).

Front

What is the relationship between work, force, and distance?

Back

Work is done when a force causes an object to move a distance. If there is no movement, no work is done.

Front

What is a pulley and how does it function?

Back

A pulley is a simple machine that uses a wheel and a rope to lift or lower objects, changing the direction of the force applied.

Front

What are the units of force called?

Back

Newtons (N).

Front

What is the principle of the wheel and axle?

Back

The wheel and axle is a simple machine that consists of a larger wheel attached to a smaller axle, allowing for easier movement or lifting.

Front

What is the work done when moving an object with a force of 2N over a distance of 15m?

Back

Work (W) = Force (F) × Distance (d) = 2N × 15m = 30 Joules.

Front

What is the difference between a wheel and axle and a lever?

Back

A wheel and axle is a circular device that rotates around a central point, while a lever is a rigid bar that pivots around a fulcrum.