Motion, Energy and Electricity

Question 1

What is the definition of speed?

Answer 1

How fast an object is going

Question 2

What is the difference between speed and velocity?

Answer 2

How fast you are going and in the direction

Question 3

What is shown on a Distance-Time graph?

Answer 3

The velocity

Question 4

What is the equation for measuring speed?

Answer 4

distance ÷ time

Question 5

What is the unit for measuring speed?

Answer 5

m/s

Question 6

What is the unit for measuring distance?

Answer 6

m

Question 7

What is the measurement for time

Answer 7

s

Question 8

What is acceleration?

Answer 8

How quickly the velocity of an object is changing

Question 9

What is the formula for acceleration?

Answer 9

Change in velocity ÷ time

Question 10

What is the unit for measuring acceleration?

Answer 10

m/s squared

Question 11

What does a velocity-time graph show?

Answer 11

Acceleration

Question 12

Is mass and weight the same thing? Explain your answer

Answer 12

No because weight is the force depending on gravity but mass is just what the object contains

Question 13

What is the gravitational field strength on Earth?

Answer 13

10N/kg

Question 14

What is weight measured in?

Answer 14

Newtons (N)

Question 15

What is mass measured in?

Answer 15

Grams (g)

Question 16

Define resultant force

Answer 16

The overall force on a point or object

Question 17

What does it mean for an object to decelerate?

Answer 17

When an object decrease in speed over time

Question 18

Define stationary

Answer 18

When an object not moving

Question 19

On a stationary teapot all the forces are balanced. What is the resultant force?

Answer 19

0N

Question 20

Who worked out the laws of motion?

Answer 20

Isaac Newton

Question 21

True or false: if the resultant force on a stationary object is zero, the object will remain stationary

Answer 21

True

Question 22

Define terminal velocity

Answer 22

The maximum speed an object can reach and galls at a steady speed

Question 23

What is the job of friction?

Answer 23

To slow things down

Question 24

What is the stopping distance?

Answer 24

The total distance it takes a moving object to stop

Question 25

What is meant by breaking distance?

Answer 25

The distance the car makes while the driver brakes

Question 26

What is meant by thinking distance?

Answer 26

The distance the car moves while the driver thinks about what to do

Question 27

Name three factors that could affect the thinking distance

Answer 27

Tiredness, drugs and alcohol

Question 28

Name three factors that could affect the braking distance

Answer 28

Any from: road surface, weather, speed, tyres, brakes, load

Question 29

Define work done

Answer 29

When a force moves and object through a distance energy is transferred and work is done

Question 30

What is the formula for work done?

Answer 30

Force x Distance

Question 31

Define Potential Energy

Answer 31

This is the energy that is stored in a stationary body

Question 32

What is the unit work done is measured in?

Answer 32

Joules (J)

Question 33

What is the formula for Potential Energy?

Answer 33

mass x gravitational energy x height

Question 34

Define Kinetic Energy

Answer 34

This is the energy stored in a moving object

Question 35

What is the formula for Kinetic Energy?

Answer 35

1/2 x mass x speed squared

Question 36

What are the two things that Kinetic Energy depend on?

Answer 36

Mass and speed

Question 37

True or False:

Kinetic Energy Transferred is not Work Done

Answer 37

False

Question 38

What is the formula for working out the kinetic energy transferred?

Answer 38

Kinetic Energy Transferred = Work Done

Question 39

How do we calculate the kinetic energy gained?

Answer 39

Kinetic Energy Gained = Potential Energy Lost

Question 40

What does the the law of thermodynamics say?

Answer 40

No energy ca be created or lost but converted from one form to another

Question 41

What is Elastic Potential Energy?

Answer 41

The work done to an elastic object