Work, Energy and Power
Authored by Kushal Patil
Science
9th - 11th Grade
NGSS covered
Used 22+ times
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11 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
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 ms²)
6 × 10³ J
6 J
0.6 J
zero
Tags
NGSS.MS-PS3-2
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
The number of joules contained in 1 kWh is
36 × 105 J
3.6 × 107 J
36 × 108 J
3.7 × 107 J
Tags
NGSS.HS-PS3-1
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Two army persons A and B each of weight of 500 N climb up a rope through a height of 10 m. A takes 20 s while B takes 40 s to achieve this task. What is ratio of the powers of person A and B?
1:2
1:4
2:1
14:1
Tags
NGSS.MS-PS3-4
NGSS.MS-PS3-5
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
If speed of a car becomes 2 times, its kinetic energy becomes
4 times
8 times
16 times
12 times
Tags
NGSS.MS-PS3-1
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
A cyclist comes to a skidding stop at 50 m. During this process, the force on the cycle due to the road is 1000 N and is directed opposite to the motion. How much work does the road do on the cycle?
5000J
500000J
50000J
10000J
Tags
NGSS.MS-PS2-2
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
A ball of mass 2kg is thrown up with a speed of 10m/s. Find the kinetic energy of the ball at the time of throwing.
50J
100J
99J
200J
Tags
NGSS.MS-PS3-1
NGSS.MS-PS3-4
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Calculate the power of an electric motor that can lift 800 kg of water to store in a tank at a height of 1500cm in 20s. (g=10m/s2).
6kW
6W
6000kW
600W
Tags
NGSS.MS-PS3-5
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