Unit 3 - Newton's Laws, Energy, Simple Machines

Front

What is Newton's Second Law of Motion?

Back

Newton's Second Law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. It is often expressed as F = ma.

Front

What happens when an unbalanced force acts on an object?

Back

An unbalanced force changes the motion of the object.

Front

What is a pulley?

Back

A pulley is a grooved wheel with a rope running along the groove, used to lift or lower loads.

Front

What does mass measure in terms of motion?

Back

Mass measures an object's inertia; greater mass means greater inertia.

Front

What is an example of a lever?

Back

A seesaw is an example of a lever.

Front

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

Back

The relationship is defined by Newton's Second Law: F = ma, where F is force, m is mass, and a is acceleration.

Front

What is inertia?

Back

Inertia is the tendency of an object to resist changes in its state of motion.

Front

What is the formula for calculating kinetic energy?

Back

The formula for kinetic energy (KE) is KE = 1/2 mv², where m is mass and v is velocity.

Front

What is a simple machine?

Back

A simple machine is a device that makes work easier by allowing us to apply force in a more effective way.

Front

What are the six types of simple machines?

Back

The six types of simple machines are lever, pulley, inclined plane, wedge, screw, and wheel and axle.