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Two boys A and B weighing 60 kg and 40 kg respectively,
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1
|
4162
|
November 28, 2016
|
|
What is the power output in watt of a 60 kg
|
|
1
|
2389
|
November 28, 2016
|
|
A mass of 10 kg is dropped from a height of 50 cm
|
|
1
|
13822
|
November 28, 2016
|
|
Shyam drops a ball of 100 g from a building of height 10 m
|
|
1
|
2514
|
November 28, 2016
|
|
A machine gun takes 10 s to fire 30 bullets
|
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1
|
2705
|
November 28, 2016
|
|
A car is moving on a levelled road and gets its velocity doubled
|
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1
|
12017
|
November 28, 2016
|
|
Calculate the kinetic energy of a car of mass 750 kg
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|
1
|
3724
|
November 28, 2016
|
|
A force applied on a body of mass 4 kg for 5 s
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|
1
|
2265
|
November 28, 2016
|
|
A girl sits and stands repeatedly for 6 min
|
|
1
|
2869
|
November 28, 2016
|
|
Five bulbs each having 100 W power are used for 4h
|
|
1
|
2403
|
November 28, 2016
|
|
A labourer whose own mass is 50 kg carries a load
|
|
1
|
5016
|
November 28, 2016
|
|
Give one situation where force is applied but no work is done
|
|
1
|
3749
|
November 28, 2016
|
|
300 J of work is to be done in lifting a bag of mass 5 kg
|
|
1
|
2335
|
November 28, 2016
|
|
Mohan lifts his cellphone to a height of 1 m
|
|
1
|
2130
|
November 28, 2016
|
|
Body of mass 1.5 kg is thrown vertically upwards
|
|
1
|
3787
|
November 28, 2016
|
|
What is meant by work done by a force?
|
|
1
|
1974
|
November 28, 2016
|
|
A body of mass 5 kg is thrown vertically upwards
|
|
1
|
3971
|
November 28, 2016
|
|
Give an example where potential energy
|
|
1
|
4686
|
November 28, 2016
|
|
If a body falls from a height bounces from ground
|
|
1
|
5023
|
November 28, 2016
|
|
When a force retards the motion of a body
|
|
1
|
1720
|
November 28, 2016
|
|
Kilowatt hour (kWh) and joule (J) is the SI unit of which physical quantity?
|
|
1
|
1300
|
November 28, 2016
|
|
The potential energy of a freely falling object decreases progressively
|
|
1
|
2112
|
November 28, 2016
|
|
How much time will a pump of 1 kW power
|
|
1
|
3044
|
November 28, 2016
|
|
What is meant by potential energy of a body?
|
|
1
|
1326
|
November 28, 2016
|
|
Find the ratio of powers of X and Y
|
|
1
|
530
|
November 28, 2016
|
|
In a house 3 bulbs of 25 W each are used for 5 h a day
|
|
1
|
7431
|
November 28, 2016
|
|
For an experiment to measure his power
|
|
1
|
2615
|
November 28, 2016
|
|
A shotput player throws a shotput of mass 3 kg
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|
1
|
3671
|
November 28, 2016
|
|
Compute the speed of 2 kg ball having kinetic energy of 4J
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|
0
|
2549
|
November 28, 2016
|
|
An electric heater of 1000 W is used for 2 h a day
|
|
1
|
8385
|
November 28, 2016
|