WorksheetsWork, Energy, Power
Total questions: 12
Worksheet time: 6mins
The mass of Mr. Shiraz is 20kg. What will be the amount of work done by him if he climbs 20 stairs, each 25 cm high in 10 seconds?
900 J
1000 J
1080 J
980 J
What will be the amount of work done to raise a 40N weight 2 meters high and hold for 2 seconds?
0 J
180 J
40 J
120 J
What amount of work will be done if 500g mass is moved 1m by applying 2N force?
2 J
9.8 J
4.9 J
0.5 J
Which information is not correct regarding work and power?
To measure power, time is not needed.
Dimension of work is
[M L2 T-2]
Dimension of power is
[M L2 T-3]
Unit is work is Joule
How much work in Joules was done by a 100kg mass person to climb down a 6m long ladder while the ladder is at a 30-degree angle with the ground?
2940
5880
5800
2900
Unit of work is
Newton
Joule
Watt
Pascal
What is electron volt?
The practical unit of work
Neutral unit of work
Unit of electricity
Unit of electric resistance
If a body is raised above the ground, work is done against which force?
Chemical
Gravitational
Frictional
Electromagnetic
When work done by force will be 0?
θ=45
θ= 60
θ= 90
θ= 180
If 0≤θ≤90° then work done by force in N is
Negative
Positive
No work is done
None of the above
How much force is needed to give a weight of 980 N an acceleration of 1 s2m ?
100N
10N
50N
1000N
Which of the following is not correct?
The vertical component of force does not work with displacement.
If a body is attached to a string and rotated in a circular motion, no work is done.
Potential energy increases due to positive work.
Dimension of work is [M L2 T-2]
