P3 - Forces For Transport

Question 1

What is the equation for distance?

Answer 1

Distance = speed x time

Distance = average speed x time

Question 2

Explain what a flat line, straight line and curved line show?

Answer 2

• Flat line = stopped
• Straight line = steady speed
• Curved line = acceleration / deceleration

Question 3

How do you find the speed of a distance time graph?

Answer 3

Gradient

Question 4

What is the equation for acceleration?

Answer 4

Acceleration = change in speed / time taken

Question 5

What is gravity?

Answer 5

The attraction between all masses

Question 6

What is the equation for weight?

Answer 6

Weight = mass x gravitational field strength

Question 7

What are the six different forces?

Answer 7

1) Gravity
2) Reaction force
3) Thrust
4) Drag
5) Lift
6) Tension

Question 8

What are the forces like on a stationary object?

Answer 8

They are all balanced

Question 9

What are the forces like on a object at a steady speed?

Answer 9

They are all balanced

Question 10

What are the forces like if an object is accelerating or decelerating?

Answer 10

The forces are unbalanced

Question 11

What does friction do?

Answer 11

Slows things down

Question 12

What is terminal speed?

Answer 12

The maximum speed it can get

Question 13

What does an objects terminal speed depend on?

Answer 13

Their drag

Question 14

What is the equation of force?

Answer 14

Force = mass x acceleration

Question 15

What is the equation for stopping distance?

Answer 15

Stopping distance = thinking distance + braking distance

Question 16

What are the four main factors of braking distance?

Answer 16

1) Speed
2) Weight
3) Brakes
4) Grip

Question 17

What is the equation for momentum?

Answer 17

Momentum = mass x velocity

Question 18

What are h the equation for force acting?

Answer 18

Force acting = change in momentum / time taken for change to happen

Question 19

What are three car safety features?

Answer 19

1) Crumple zone
2) Seat belts
3) Air bags

Question 20

What is work done?

Answer 20

When a force moves an object

Question 21

What is the equation for work done?

Answer 21

Work done = force x distance

Question 22

What is gravitational potential energy (GPE)?

Answer 22

The energy given to an object due to its height

Question 23

What is the equation for gravitational potential energy (GPE)?

Answer 23

GPE = mass x gravity x height

Question 24

What is kinetic energy (KE)?

Answer 24

The energy of movement

Question 25

What is the equation for kinetic energy (KE)?

Answer 25

KE = 0.5 x mass x speed(2)

Question 26

What is the equation for kinetic energy transferred?

Answer 26

Kinetic energy transferred = work done by brakes

Question 27

What do falling objects do besides fall?

Answer 27

Convert GPE into KE

Question 28

What is the equation for power?

Answer 28

Power = work done / time taken

Power = force x speed

Question 29

What is fuel consumption?

Answer 29

The amount of fuel used

Question 30

What can effect fuel consumption?

Answer 30

• Driving style
• Weight
• Drag

Question 31

What do cars produce when they burn fuel?

Answer 31

They release emissions

Question 32

What are the three things cars can run on?

Answer 32

1) Fossil fuels
2) Biofuels
3) Electricity