Forces and Motion Quiz

Study Notes

Forces

A force is a push, pull or twist.
Forces are represented in diagrams using arrows.
Forces can be contact forces (when one object is in contact with another) or non-contact (when objects are not in contact).
All forces acting on an object are added together to determine the net force acting on the object.

Gravity

Every object with mass in the universe pulls on other objects with a force of gravity.
Mass is a measure of the amount of material in an object or substance (measured in kilograms, kg).
The weight of an object or substance is a measure of the force of gravity pulling it down (measured in newtons, N).

Friction

Friction is the force applied to the surface of an object when it moves against the surface of another object.
Friction can slow an object, stop it from moving or start it moving.
The friction that assists movement is called traction.
Friction also exists in fluids (fluid friction) which affects objects moving through the air and water.
Keeping Afloat
Buoyancy is a force that keeps objects floating.
Surface tension is the pulling of particles in a liquid towards each other.

Magnetism

Magnetism is a non-contact force.
Magnets that retain their magnetism when removed from other magnets are called permanent magnets.
Temporary magnets are those that lose their magnetism when removed from another magnet.
All magnets have a north pole at one end and a south pole at the other.
The area where the magnetic force acts is called the magnetic field.

Electric forces

All matter is made up of atoms.
Electrons and protons are both charged particles in the nucleus (negative and positive respectively).
Substances usually become charged by the addition or removal of electrons.
This can be done in two ways: by friction or by contact.
The area around an electrically charged object where objects experience an electric force is called an electric field.
The electricity that builds up is called static electricity.
The charge on the objects is called electrostatic charge (or static charge).

Staying safe

Helmets are vital to protect from injury.
Without a helmet, the head stops suddenly when it hits the ground.
The sudden impact can cause serious head injuries.
Airbags and seatbelts are vital for safety in cars.
In a crash, a seatbelt prevents the occupants from moving forwards through the windscreen or into other parts of the inside of the car, while airbags help slow the upper body down more gradually.

Description

Test your knowledge on forces, gravity, and friction in this engaging quiz. Understand the concepts of contact and non-contact forces, the role of gravity, and how friction affects movement. Suitable for students learning about physical science concepts.