Forces

Question 1

What can forces change?

Answer 1

Forces can change

• speed
• direction
• shape

Of an object.

Question 2

What are forces measured in?

Answer 2

Newton’s (N) using a newton balance.

Question 3

What is mass?

Answer 3

Mass is a measure of the amount of matter in an object.

Question 4

What is mass measured in?

Answer 4

Kg.

Mass does not change if the object is on another planet

Question 5

What is weight?

Answer 5

Weight is the force of gravity that acts on an object.

Question 6

Whatbis weight measured in?

Answer 6

Newton’s (N)

(weight DOES CHANGE different planets).

Question 7

What is the force of gravity on earth?

Answer 7

9.8 N

Question 8

Newton’s first law of motion

Answer 8

‘An object will remain at rest, or continue to make with constant speed, (in a straight line), unless an unbalanced force acts on it.’

Question 9

Newton’s 2 law

Answer 9

Accleraration is dependent on the forces acting upon the object and the mass of the object.

(Mass of vehicle increased, acceleration decreases)

F=ma

Question 10

Newton’s 3 law of motion

Answer 10

‘For every action force there exists an equal but opposite reaction force.’

Note: action/ reaction forces always act on different objects).