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Kinetic-energy-questions step by step learning

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Kinetic energy – complete the table, make sure you include working
Mass (kg)
Speed (m/s)
20
300
0.5
17
65
2.9
66
13
1200
40
2
35
26
5
10
4
1
11
Working
Type: 0.5 x mass x speed x speed
Kinetic energy
(J)
Kinetic energy – complete the table, make sure you include working
Mass (kg)
Speed (m/s)
20
300
0.5
17
65
2.9
66
13
1200
40
2
35
26
5
10
4
1
11
Working
Type: 0.5 x mass x speed x speed
Kinetic energy
(J)
Kinetic energy – complete the table, make sure you include working
Mass (kg)
Speed (m/s)
20
300
0.5
17
65
2.9
66
13
1200
40
2
35
26
5
10
4
1
11
Working
Type: 0.5 x mass x speed x speed
Kinetic energy
(J)
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
Mass (kg)
USE THIS
ONE
Speed (m/s)
2000g
30g
500g
4
5
55
110g
55kg
1.5
50
290g
6600g
700g
12000g
30g
990g
7kg
9.5kg
11
3.5
3
6
30
10
8
2
Working
Kinetic energy (J)
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
Mass (kg)
USE THIS
ONE
Speed (m/s)
2000g
30g
500g
4
5
55
110g
55kg
1.5
50
290g
6600g
700g
12000g
30g
990g
7kg
9.5kg
11
3.5
3
6
30
10
8
2
Working
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) HINT work out the kinetic energy at 10m/s
b) Now work out the kinetic energy at 20m/s
c) 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) HINT work out the kinetic energy at 10m/s
e) Now work out the kinetic energy at 20m/s
f) How much has it increased, has it
A Doubled
B Halved
C Multiplied by four
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