7r Unit 1: Force Flashcards
1
Q
What happens to a ball that is bouncing?
A
The gravity pulls the ball down, and as it lands, it squashes.
2
Q
When you are standing, what forces are acting on you?
A
The gravity from earth pulling you down, and the gravity from you, pulling the earth up.
3
Q
What do you measure force in?
A
Newtons
4
Q
Name the force that helps you float
A
Upthrust
5
Q
Name Hookes law
A
If the extension doubles, then you have doubled the force. This is shown in linear graphs
6
Q
How do you calculate your weight?
A
Mass (the reading on weighing scales) x 10 (gravitational pull on earth).
7
Q
Is the force balanced on a cyclist slowing down?
A
No
8
Q
Is the force balanced on a boat speeding up
A
No
9
Q
Is the force balanced on a boy floating in water
A
Yes, the upthrust is the same
