Physical Science Practice Exam

Front

What is the formula to calculate work done?

Back

Work (W) = Force (F) × Distance (d)

Front

What is a lever?

Back

A lever is a simple machine that consists of a rigid bar that pivots about a fixed point called the fulcrum.

Front

What is gravitational potential energy?

Back

Gravitational potential energy (PE) is the energy an object possesses due to its position in a gravitational field, calculated as PE = mgh, where m is mass, g is acceleration due to gravity, and h is height.

Front

What are protons?

Back

Protons are positively charged particles found in the nucleus of an atom.

Front

What is the work done when a force is applied to a stationary object?

Back

The work done is 0 because work requires movement in the direction of the force.

Front

How do you calculate the distance an object is moved when work and force are known?

Back

Distance (d) = Work (W) / Force (F). For example, if 2J of work is done with a force of 0.2N, then d = 2J / 0.2N = 10m.

Front

What is the unit of work in the International System of Units (SI)?

Back

The unit of work is the Joule (J).

Front

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

Back

According to Newton's second law, Force (F) = Mass (m) × Acceleration (a).

Front

What is the formula for calculating gravitational potential energy?

Back

PE = mgh, where m is mass in kilograms, g is the acceleration due to gravity (approximately 9.81 m/s²), and h is height in meters.

Front

What is the significance of the fulcrum in a lever?

Back

The fulcrum is the pivot point around which the lever rotates, allowing for the amplification of force.