P2 part 1

Question 1

What is the definition of a force?

Answer 1

A push or a pull action that has direction

Question 2

What are balanced forces?

Answer 2

When the forces are equal

Question 3

When do balanced forces occur?

Answer 3

When an object isn’t moving

Question 4

What are unbalanced forces?

Answer 4

When the forces aren’t balanced

Question 5

When do unbalanced forces occur?

Answer 5

When objects accelerate or decelerate

Question 6

What is Newton’s third law of motion?

Answer 6

Every action has an equal opposite reaction

Question 7

What is resultant force?

Answer 7

When 2 or more forces work together, they add up to a resultant force. It means what the force is.

Question 8

What 3 things can resultant forces do?

Answer 8

1. Change the speed of an object 2. change the direction of an object 3. change of shape of an object

Question 9

In a moving object, when the forces are balanced, describe what happens to the object

Answer 9

It continues moving at a steady pace in a straight line

Question 10

In a moving object, when the forces are unbalanced, describe what happens to the object

Answer 10

Accelerates in the direction of the force (this could mean slowing down if the force opposes the motion)

Question 11

In a stationary object, when the forces are balanced, describe what happens to the object

Answer 11

Remains stationary

Question 12

In a Stationary object, when the forces are unbalanced, describe what happens to the object

Answer 12

It starts moving either accelerates or decelerates

Question 13

What is Newtons Second law

Answer 13

Resultant force = mass x acceleration

Question 14

What is velocity?

Answer 14

Speed and direction

Question 15

What is speed?

Answer 15

How fast something is moving

Question 16

Which axis do the independent variable go on?

Answer 16

x axis

Question 17

Which axis do the dependent variable go on?

Answer 17

y axis

Question 18

What is acceleration?

Answer 18

The rate of change of velocity in an object

Question 19

What is the equation for acceleration?

Answer 19

acceleration = change in velocity/time taken

Question 20

What is thinking distance?

Answer 20

The distance you travel whilst you are thinking about stopping when you see the stop sign

Question 21

What is braking distance?

Answer 21

The distance travelled by the car whilst the brakes are on.

Question 22

How is total stopping distance calculated?

Answer 22

Thinking distance + Braking distance

Question 23

What factors can increase thinking distance?

Answer 23

Foggy, Rainy, Tiredness/drug use/alcohol

Question 24

What factors can increase braking distance?

Answer 24

speed, windy roads, number of people in car, luggage

Question 25

To find the distance travelled, you need to find the area under the graph. How do you do this?

Answer 25

Try and fit the area under the graph into shapes, find all the areas of those shapes and add them together.

Question 26

Name 3 ways to increase the drag of an object?

Answer 26

Increase surface area, Increase weight, Change materials

Question 27

What is air resistance caused by?

Answer 27

Moving particles pushing air out of the way

Question 28

What does aerodynamic mean?

Answer 28

Having a shape which reduces the drag from air moving past.

Question 29

What is mass and how is it measured?

Answer 29

How much matter makes up an object. Kilograms