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Kinetic-energy-questions step by step learning

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20

300

0.5

17

65

2.9

66

13

1200

Kinetic energy – complete the table, make sure you include working

Mass (kg) Speed (m/s) Working

Type: 0.5 x mass x speed x speed

20

300

0.5

17

65

2.9

66

13

1200

40

2

35

26

5

10

4

1

11

Kinetic energy – complete the table, make sure you include working

Mass (kg) Speed (m/s) Working

Type: 0.5 x mass x speed x speed

20

300

0.5

17

65

2.9

66

13

1200

40

2

35

26

5

10

4

1

11

Kinetic energy – complete the table, make sure you include working

Mass (kg) Speed (m/s)

40

2

35

26

5

10

4

1

11

Working

Type: 0.5 x mass x speed x speed

Kinetic energy

(J)

Kinetic energy

(J)

Kinetic energy

(J)

2000g

30g

500g

110g

55kg

290g

6600g

700g

12000g

30g

990g

7kg

9.5kg

Extension 1

You might have to convert some units now.

1000g = 1kg

So if you have a mass in g, you need to divide by 1000 to get to kg.

Mass

2000g

30g

500g

110g

55kg

290g

6600g

700g

12000g

30g

990g

7kg

9.5kg

Extension 1

Mass (kg)

USE THIS

ONE

Speed (m/s)

4

5

55

1.5

50

30

10

8

2

11

3.5

3

6

Working

You might have to convert some units now.

1000g = 1kg

So if you have a mass in g, you need to divide by 1000 to get to kg.

Mass Mass (kg)

USE THIS

ONE

Speed (m/s)

4

5

55

1.5

50

11

3.5

3

6

30

10

8

2

Working

Kinetic energy (J)

Kinetic energy (J)

Extension 2

Now try these questions. The method is exactly the same, you just need to read what the mass and speed are in the text. Do the working in your book.

1) Lydia drives her car at a speed of 30m/s. If the combined mass of her and the car is

1000kg what is her kinetic energy?

2) Sam rides her bike at a speed of 10m/s. If the combined mass of Sam and her bike is

80kg what is her kinetic energy?

3) Josh is trying to catch a bus and is running at 3m/s. If he has a mass of 60kg how much kinetic energy does he have?

4) A 2000kg car is being driven at a speed of 10m/s. If it doubles its speed to 20m/s what happens to the car’s kinetic energy? a) b) c)

HINT work out the kinetic energy at 10m/s

Now work out the kinetic energy at 20m/s

How much has it increased, has it

A Doubled B Halved C Multiplied by four

Extension 2

Now try these questions. The method is exactly the same, you just need to read what the mass and speed are in the text. Do the working in your book.

5) Lydia drives her car at a speed of 30m/s. If the combined mass of her and the car is

1000kg what is her kinetic energy?

6) Sam rides her bike at a speed of 10m/s. If the combined mass of Sam and her bike is

80kg what is her kinetic energy?

7) Josh is trying to catch a bus and is running at 3m/s. If he has a mass of 60kg how much kinetic energy does he have?

8) A 2000kg car is being driven at a speed of 10m/s. If it doubles its speed to 20m/s what happens to the car’s kinetic energy? d) e) f)

HINT work out the kinetic energy at 10m/s

Now work out the kinetic energy at 20m/s

How much has it increased, has it

A Doubled B Halved C Multiplied by four

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