Forces

Front

What happens when two north poles of a magnet are placed together?

Back

They repel.

Front

Which force must have the objects touching in order for it to work?

Back

Friction.

Front

What is an example of a situation that uses friction?

Back

Brakes on a bike.

Front

As the mass of an object increases, what happens to the force needed to move it?

Back

More force is needed.

Front

What is the effect of gravity on objects dropped from the same height?

Back

They hit the ground at the same time regardless of mass.

Front

What is friction?

Back

A force that opposes the motion of two surfaces in contact.

Front

What are the two types of friction?

Back

Static friction and kinetic friction.

Front

What is the role of gravity in motion?

Back

It pulls objects toward the center of the Earth.

Front

How does mass affect gravitational force?

Back

Greater mass results in a stronger gravitational pull.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force of gravity acting on that mass.