Forces
What does Gravity mean?
A pulling force
What does Exert mean?
To make a downwards, upwards or sideways force.
What does Thrust mean?
A force that pushes something up against gravity or sideways against friction.
What is an Alloy?
A mixture of metals.
Does magnetic force exist between two magnets when they are near to each other?
Yes
When we are pushing a table, what forces exist?
Applied force, friction
When an object is pushed or pulled by another object, what force will happen?
Applied force
If you kicked a ball, it would not fly off forever. What is the reason?
Because there is Gravity
Is steel an alloy?
Yes, it is an alloy made mainly from iron.
Why are paper clips attracted to a bar magnet?
The paper clips are made from magnetic material.
What is the natural satellite of Earth?
Moon
What can we do to reduce drag when we swim in the water?
Copy the streamlined shape of the fish/wear a swimsuit that has smooth surfaces
What is the force in the water that pushes things up?
Upthrust force
Give me one example object that is made of stainless steel
Medical instruments, scissors, knives, sinks
There are two magnets. The first magnet did not attract as many paper clips as the second magnet. Which magnet is the strongest?
Second
There is a boat on the sea. What is the force that pushes the boat up?
Upthrust
There is a boat on the sea. What is the force that pushes the boat down?
Gravity
There is a boat on the sea. What force will slow down the speed of the boat?
Air resistance
List 3 non magnetic metals.
Silver, gold, platinum
Why does the high-speed train floats above the tracks?
Because the tracks are made of very strong magnets.
When you are riding a bicycle, what forces pull you back?
Friction, air resistance
What type of bicycle help in reducing drag force?
Strong but lightweight, high-tech gears, tyres that cope rough or smooth roads
Why is it difficult to cycle on a day when the wind is blowing strongly?
Because it has strong air resistance
How do we use brass in our daily life?
We use it to make door handles and ornaments.
Explain why and how two magnets repel and attract each other.
Because they have magnetic force between them.
Attract: North and Sole
Repel: North and North