Forces And Motion

Question 0

What are the units for force?

Answer 0

Newtons (N)

Question 1

Identify the forces acting on a stationary/moving object

Answer 1

Thrust, friction/air resistance, weight, support/reaction force

Question 2

Define friction

Answer 2

Friction is a force created by two objects moving against each other eg. Rubbing your hands, wheels on a road. Friction causes something to slow down

Question 3

What factors affect how large the friction force is?

Answer 3

Liquids cause a decrease in friction and rougher materials or increased pressure cause an increase in friction.

Question 4

What is newtons 1st law of motion

Answer 4

Objects will keep doing what they are doing unless something else exerts force on them

Question 5

What is Newtons 2nd law of motion

Answer 5

A net force causes an object to accelerate

Question 6

What is newtons 3rd law

Answer 6

Each force has an equal and opposite reaction.

Question 7

What is a balanced force

Answer 7

Where the force is equal to its opposing force

Question 8

What is an unbalanced force?

Answer 8

An unbalanced force is when one force is stronger than the opposite force

Question 9

Define net force

Answer 9

Net force is the difference in Newtons acting on an object

Question 10

How to calculate the net force on an object

Answer 10

(Higher amount of Newtons) 200N - (lower amount of Newtons) 50N = (Net force) 150N

Question 11

What happens to object that is balanced and unbalanced?

Answer 11

Balanced: the object is either still or moving at a constant speed
Unbalanced: the object is accelerating or decelerating

Question 12

What is mass

Answer 12

Mass is the amount of matter that makes up a object

Question 13

What is weight?

Answer 13

Weight is the force caused by gravity

Question 14

What affect does mass and gravity have on the weight force?

Answer 14

The higher mass and higher amount of gravity means that the weight force is stronger
The lower the mass and amount of gravity the lower the weight force is

Question 15

How do you calculate speed from a distance time graph

Answer 15

Take the checkpoint and the time related to that checkpoint and divide the distance by the time

Question 16

What does a stationary object look like on a distance time graph

Answer 16

A straight horizontal line

Question 17

What does a distance time graph for an object traveling at a constant speed look like?

Answer 17

It is a long diagonal line with equal distance traveled between time check points

Question 18

What does a distance time graph look like for an accelerating object

Answer 18

The line becomes steeper and less consistent

Question 19

What does a distance time graph look like for a decelerating object

Answer 19

It becomes a decreased amount of distance between time checkpoints