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WorksheetsPhysics Class9
Total questions: 10
Worksheet time: 2mins
Does work done depend upon the velocity of the body?
Yes
No
What will cause greater increase in kinetic energy of a body?
Increase in mass
Increase in velocity
Increase in displacement
Increase in force
What is the SI unit of work done, power, and force respectively?
Joule, Metre, Watt
Metre, Watt, Newton
Joule, Watt, Newton
Newton, Metre, Joule
Find the energy in kWh consumed in 10 hours by a machine of power 500 W.
5000Wh
5000kWh
5kWh
5Wh
When a book is lifted from a table, against which force work is done ?
Muscular Force
Gravitational Force
Magnetic Force
Electrostatic Force
What is the work done when force in the situation shown above ?
Positive
Negative
Zero
A force of 7 N acts on an object. The displacement is, say 8 m, in the direction of the force. Let us take it that the force acts on the object through the displacement. What is the work done due to gravity ?
(Write only magnitude in number)
(a)
A lamp consumes 180 kJ of electrical energy in 5 hrs. What is its power ?
18 Watt
36 Watt
10 Watt
90 Watt
A body performs no work. Does it imply that the body possesses energy ?
Never
Always
May be
Who verified experimentally the law of conservation of energy?
John Dalton
James Prescott Joule
Blaise Pascal
Galileo Galilei
Isaac Newton
