Force,work,power And Movements Flashcards
1
Q
A force
A
Is anything which causes an object to change it velocity
2
Q
Velocity
A
Is the speed in a given direction
3
Q
Forces are measured in
A
Newtons
4
Q
Push
A
Changes the velocity of an object
5
Q
Pull
A
Change the velocity of an object
6
Q
Weight
A
Moves object towards the ground
7
Q
Friction
A
Slows down moving objects
8
Q
Electric
A
Causes charged particles to move
9
Q
Magnetic
A
Causes magnetic materials to move
10
Q
Friction advantages
A
Helps you stop Brakes your car Removes rough surfaces Helps you walk Prevents tyres from slipping while driving Keeps you upright when walking When cold rub hands to get warm
11
Q
Friction disadvantages
A
Braces cause blisters due to skin being rubbed
Wear down new shoes
Get carpet burn if you slip
When driving friction between air and car wastes fuel
12
Q
Work
A
Is done when a force moves an object
13
Q
Joule
A
Work and energy are measured in joule
14
Q
Power
A
Is the rate at which the work is done
15
Q
Power is measured in
A
Watts where 1 watt = 1j/s
