Forces

Question 1

What is a force?

Answer 1

A force is a push or pull (or twist)

Question 2

What is force measured in and what symbol do we use to represent force?

Answer 2

Measured in Newtons (N)
Symbol = F

Question 3

What can forces change?

Answer 3

Forces can cause an object to change speed (decelerate or accelerate), direction or shape

Question 4

What happens if a pair of forces are balanced?

Answer 4

The object will either: stay at rest (stationary) or continue moving in a straight line at a constant speed

Question 5

How do you calculate resultant forces?

Answer 5

Minus the smaller number off the bigger number. eg. <===50 - 5=> =45
45N = resultant force <===

Question 6

What is magnetism?

Answer 6

Magnetism is a field force - a non-contact force = acts over a distance. Magnets have 2 poles - a north and a south pole

Question 7

What is mass?

Answer 7

Mass is the amount of matter that an object is made up of

Question 8

What is mass measured in?

Answer 8

kilograms (kg) using an ordinary balance/scale

Question 9

Is the mass of an object constant everywhere in the universe?

Answer 9

Yes

Question 10

What is weight?

Answer 10

Weight is the force of gravity on a mass due to the pull of the Earth

Question 11

What is weight measured in?

Answer 11

Newtons (N) using a spring balance

Question 12

Does the weight of an object varie place to place depending on the force of gravity?

Answer 12

Yes

Question 13

What is the equation to finding mass, weight and gravity?

Answer 13

W = m x g
m = W ÷ g
g = W ÷ m

Question 14

Do opposite charges repel each other?

Answer 14

No they attract each other