Gravitational Force
What is the name of the planet we live on
Earth.
What do we call a force that moves something away?
Push.
What force slows down moving objects when surfaces touch?
Friction.
What force pulls things down?
Gravity.
What do we call forces that are equal and opposite?
Balanced forces.
Which surface usually has more friction, rough or smooth?
Rough surface.
What happens when you drop an eraser?
It falls down.
What do we call forces that are not balanced?
Unbalanced forces
What happens when you rub your hands together?
They become warm.
rue or False: Gravity pulls things towards Earth.
True.
What is another name for resultant force
Net force.
What do cars use to help them stop?
Brakes.
What is a force?
A push or a pull.
What happens when two equal forces push a stationary box in opposite directions?
The box stays still.
Why do shoes have rubber soles?
To provide grip and prevent slipping.
Which has weaker gravity, Earth or the Moon?
The Moon.
If two people push a box in the same direction, do their forces add or subtract?
Add.
True or False: Smooth surfaces usually have more friction than rough surfaces.
False.
Why does rain fall from the clouds?
Because of gravity.
Two students push a box in opposite directions. One pushes harder. Which way will the box move?
Towards the stronger force.
What type of friction happens when a book slides across a table?
Sliding friction.
Why can astronauts jump higher on the Moon?
The Moon has weaker gravity.
Two students push a box to the right with forces of 5 N and 3 N. What is the resultant force?
8 N to the right.
Why is it easier to slip on a wet tile floor?
Because there is less friction.
Give two examples of gravity in daily life.
A ball falling and rain falling.
One student pushes a box right with 10 N. Another pushes left with 6 N. What is the resultant force and direction?
4 N to the right.
Name two advantages and one disadvantage of friction.
Advantages: Helps us walk and stop vehicles. Disadvantage: Causes wear and tear.