PUSHES and PULLS are FORCES.
Forces start objects moving and forces stop objects moving.
Pete and Tony are PULLING in opposite directions. When the PULLS are the same, Pete and Tony do not move because the forces are EQUAL and OPPOSITE.
In a tug of war, when the forces are not equal, one of the players will be pulled in the direction of the force and will be the winner.
We all feel as special 'pull', this force is called GRAVITY.
Gravity pulls objects towards the Earth.
Which THREE of these statements are true for PUSHES and PULLS?
When Chris hits (pushes) the ball with his racket, what effect does this force have on the ball?
Which THREE of these are examples of forces making objects change direction?
Ruth and Ali are baking. When they make their biscuit dough they use pushes and pulls, forces, to mix the ingredients together.
They use a rolling pin to roll-out the dough. What effect do the pushes and pulls of the rolling pin have on the dough?
Gravity pulls objects towards the ground. The air around PUSHES against the falling object.
We describe PUSHES and PULLS as...
Pierre is flying his kite on a windy day. Oh no, he let go of the string!
The kite does not fall back to the ground, but flies away. Which of these explains the force which carries the kite away?
Chris and Tony are investigating other pushes and pulls. They STRETCH the spring using a pulling force.
Which word is the opposite of stretch?
When the boys pull the spring, it changes shape.
How can they descibe the way the spring changes shape when they STOP applying this force?