FORCES
A force is a ___________ or a ______________.
Pull or Push
What force pulls objects towards Earth?
Gravity
A student pushes a box with 40 N to the right. Friction pushes with 15 N to the left. What is the net force?
25 N to the right.
What happens when the forces acting on an object are balanced?
There is no change in motion
Who is most likely to forget their book?
Harry, Junior, Grace, Abel
What unit is used to measure force?
Newtons (N)
Is gravity a contact or non-contact force?
Non-contact
Why would a crumpled piece of paper generally fall faster than a flat sheet of paper?
The crumpled paper has less surface area, so it experiences less air resistance.
What happens when forces are unbalanced?
The object's motion changes
Who is most likely to have a tv show created about them?
Vin and An
What type of force occurs when two objects are touching?
Contact force
What happens to an object when it is dropped?
Gravity pulls it towards Earth, causing it to fall
A person is standing still. Gravity pulls them down with 600 N. What must the normal force be for them to remain stationary?
600 N upwards.
A book is sitting still on a table. Gravity pulls it down. What force from the table acts upwards?
Normal force
Who is most likely to finish their work first?
Edwina
A magnet attracting a paperclip is an example of what type of force?
Non-contact force
What force acts upwards on a falling object when it moves through air?
Air resistance
A parachute investigation finds:
What conclusion can you make about parachute size and falling time?
As parachute size increases, falling time increases because the larger parachute creates greater air resistance.
A cyclist stops pedalling but eventually stops. What force is helping slow them down?
Friction and air resistance
Who is most likely to become famous?
Miss Sorgel
A student pushes a box to the right with 20 N, while another student pushes it to the left with 20 N. What is the net force?
0N
If a parachute is made larger, what generally happens to the falling time?
The falling time increases because the larger parachute creates more air resistance.
Where does Miss Sorgel really want to go on holiday?
BORA BORA !!!!!
A student pushes a box with 50 N to the right. Friction pushes back with 30 N. What is the net force and which direction will the box accelerate?
20 N to the right.
What phrase does Miss Sorgel say ALL the time?