A
What topic are we learning in Science at the moment?
Force and motion
A force is a push and pull on an object.
True or false
Force is measured in KG
False
What is the instrument used to measure force?
Spring Balance
What is the unit of force?
Newtons (N)
What does the arrow in a force diagram indicate?
The direction of the force
What is the resultant force?
2N <------- and 12N -------->
10N ------>
What does the length of an arrow in a force diagram indicate?
The magnitude of the force.
true or false
A ball will roll faster on a carpeted floor than on a bare floor.
False, it will roll slower because of friction.
When is your birthday?
Happy Birthday
Complete the sentence:
The _______________ is the single force that has the same effect on the object as all the individual forces acting together.
Resultant force
Give me one example of friction as an advantage
...
Complete the sentence:
Friction acts in the _____________ direction of the movement.
opposite
What is the resultant force, if I push a shopping cart
8N ----> and 12N <------- ?
4N <------
Give an example of friction as a disadvantage.
...
Can you sing the Force song?
Force is anything....
True or false
The colour of an object affects friction
False
True or False
Paint and Flash are riding their bicycles the same distance.
But Paint is riding his bicycle on the grass, and Flash is riding his bicycle on cement.
Who would need to pedal harder? Why?
Paint, because the surface is rougher.
What happens to an object if two equal forces are acting on it in opposite directions?
The object won't move. The resultant force is 0
True or false
Forces cannot be seen but their effects can be seen.
true
What two factors affect friction?
Texture of the contacting surfaces.
The weight of an object
Name 3 advantages of friction.
- stay still
- grip/hold
- prevents slipping
- produces heat
- sharpens and smoothens objects
- stops moving object
Can p5/12 swim at English camp?
HAHA
- wears out surfaces
- slows down moving objects
- produces unnecessary heat and noise
Why do car tyres have thread patterns?
To increase friction between the tyre and road.