What is it called when we stretch a spring? Expand or Compress
Expand
What type of potential energy does a wrecking ball use?
Gravitational
What does it mean to compress something?
To push down with force.
Give an example of where we use springs in every day life
Any appropriate example, e.g. Shocks in vehicle suspension, clicker pens, keyboards, toasters, door handles, matrasses.
Give an example of where we use elastics in everyday life.
Any appropriate example.
What is the name of the force that keeps objects on the ground on Earth and the planets in orbit around the sun?
Gravity
What is potential energy?
Energy that is stored.
What are the two types of axles?
Fixed axle and turning axle
What is the definition of a system?
A group of parts that work together to do a specific job.
Why are brakes important in vehicles?
For safety. It is important to be able to slow down and stop.
Give 2 examples of where wheels and axles have made life easier for people
Any appropriate example.
Does a skateboard have a fixed axle or a turning axle?
Fixed axle, it does not turn with the wheels.
The axle of a car is turned by the motor of the car. The axle turns the wheels so that the car can move. What type of axle is this?
Turning axle
Explain how these heavy stone blocks were moved by the people who built the pyramids.
They used a system of logs to roll the blocks along the ground.
Explain the energy that the ball has in picture 1, and what will happen to that energy if the person lets go (picture 2).
The ball has potential energy, if the person lets go, the potential energy will become kinetic energy as the ball falls.
Which skater has the most potential energy and why?
The dog (B) because they are the highest above the ground.
