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WorksheetsWork and Energy Class 9 Quiz
Total questions: 10
Worksheet time: 9mins
What is the formula for kinetic energy?
mass * velocity^2
1/2 * mass * velocity
mass + velocity^2
1/2 * mass * velocity^2
Define potential energy.
Energy due to temperature
Energy due to color
Energy due to position or state
Energy due to motion
What is the unit of power?
A
kg
W
V
A force of 20 N is applied to move an object 5 meters. Calculate the work done.
100 J
50 J
200 J
10 J
What is the kinetic energy of an object with a mass of 8 kg and a velocity of 6 m/s?
72 J
100 J
144 J
48 J
Calculate the potential energy of an object with a mass of 3 kg and a height of 8 meters.
123.8 joules
235.2 joules
17.2 joules
56.4 joules
1KW = ?
1000w
100w
10000w
none
Si unit of power
Watt
ma
pa
1J/s
When a body falls freely towards the earth, then its total energy
(a) increases
(b) decreases
(c) remains constant
(d) first increases and then decreases
A girl is carrying a school bag of 3 kg mass on her back and moves 200 m on a levelled road. The work done against the gravitational force will be (g =10 m s–2)
6×103 J
6 J
0.6 J
zero
