Forces
What is a force
A puh or pull.
Forces start or stop objects moving, change the speed or direction of objects,change the shape of objects
Who first coined the term 'gravity'
What is sir isaac newton
What does friction do?
It slows objects down
What are the differences between a unbalanced force and a balanced force.
When a force is balanced, there is no movement.
When a force is unbalance, there is movement.
What are the two main types of forces
contact and non-contact
What is gravity
The force that pulls an object towards the center of the earth
Name a surface with high friction.
rubber, carpet, grass, sand....
What makes an object move?
unbalanced force
What is the unit of measure for force
What is newton
Why do planets orbit around the sun.
The gravity of the sun keeps them in orbit
Name a surface that has low friction.
ice, water, oil......
What is balanced force.
Two forces equal in size, acting in opposite directions on an object. No movement occurs.
If an object is not moving, the forces are _______.
balanced
What two forces are at work when you are standing
gravity and muscular forces
Does a water slide have hi or low friction?
low
An example of balanced force
a hanging object, standing, floating in water .....
Name 4 types of forces.
What is gravity, magnetic, electrostatic, muscular, friction.
Which has more gravity, the earth or the sun. Explain.
The sun, because it has more mass.(its bigger and heavier)
What force slows a skateboard down when the rider puts his/her foot on the ground.
When a pushing force is the same as the pulling force, then the forces are _____ and there is _____ movement.
balanced, no movement