Key Stage 3.3 Physics Quiz 1

How does friction affect the movement of an object?

• Friction increases the speed of an object, making it move faster.
• Friction has no effect on the movement of an object.
• Friction only affects objects in motion, not at rest.
• Friction opposes the movement of an object, slowing it down or stopping it.

Describe two ways of reducing the friction between two surfaces without using rollers or wheels.

• Apply heat to the surfaces.
• Apply a lubricant

• Use rougher surface textures.
• Use a smoother surface finish

Where does your body get its energy from?

• Sunlight and heat
• Water and air
• Vitamins and minerals
• Food

Energy stored in nuclear fuel in the Sun transfers energy by _________.

Energy stored in plants is stored as ________ energy.

What is the correct word in physics for 'changing speed'?

• acceleration
• momentum
• velocity
• force

The combination of multiple forces acting on an object is called the 'resultant force'.

• True
• False

Air resistance or water resistance is called density.

• True
• False

A moving car has friction and air resistance acting on it of 400N. The force of the engine is 400N. What will happen to the speed of the car?

• The speed of the car will increase.
• The car will come to a stop.
• The speed of the car will decrease.
• The speed of the car will remain constant.

What are three things that unbalanced forces can do?

• Change speed

• Change direction

• Change shape

• Change colour

• Change length