chapter 9 ( forces and energy) Flashcards
be able to rmb everything learnt
1
Q
what type of forces are there
A
pull or push force
2
Q
examples of contact forces
A
- frictional force
- tensional force
- Air resistance
- applied force
3
Q
example of a non contact force
A
- gravitational force , electrical force, magnetic force
4
Q
what are the effects of forces
A
- makes an object speed up
- make an object slow down
- changes its direction of movement of object
-makes a moving object stop
5
Q
what happen when there is a force applied on an object
A
there would be a turning effect amd the object would pivot
6
Q
definition of Gravity
A
Gravity is a non contact force
7
Q
S.I unit of weight
A
Newton
8
Q
mass meaning
A
amount of matter in object
9
Q
weight meaning
A
the gravitational force acting on object
10
Q
what is friction
A
when two objects rub against or in contact with each other.
11
Q
ways to reduce friction
A
wheel , ball bearing , roller ,applying lubricant oil. or grease
12
Q
instrument to measure force
A
spring balance
13
Q
type of forces
A
contact and non- contact
