Question # 1

The potential energy of a body of mass 'm' placed at a height 'h' above the surface of earth is equal to

Choose an answer

P.E. = mg

P.E. = mgh

P.E. = 3mgh

P.E. = 2mgh

The kinetic energy of the body of mass 1000 kg moving a speed of 20 ms^-1 will be:

Choose an answer

2 x 10² J

2 x 10³J

2 x 10⁵J

2 x 10⁸J

Which of following units is equal to Kgm² s^-2

Choose an answer

Newton

Joule

Watt

Coloumb

1 hp is equal to :

Choose an answer

747 W

746 W

748 W

1000 W

The rate of doing work is called :

Choose an answer

Power

Work

Efficiency

None of above

If mass of a body becomes half that its energy K.E will be reduce to:

Choose an answer

Zero

Half

Double

4 Times

From following, which one is a renewable source of energy?

Choose an answer

Coal

Gas

Sunlight

Petrolum

The power of electric kettle is 500W and takes 2s to heat up, find heat generated?

Choose an answer

E = 250 w

E = 1000 w

E = 10000 J

1KJ

If the direction of motion of the force is perpendicular to the direction of motion of the body then work done will be:

Choose an answer

Maximum

Minimum

Zero

None of these

Mathematically, % efficiency is defined as & nbsp

Choose an answer

Efficiency % required form or input/ total input energy x 100

Efficiency % input energy / output energy x 100

Efficiency % work / time x 100

Work is zero when "F" and "S" will be:

Choose an answer

Parallel

Perpendicular

Anti parallel

Tangent

SI unit of work is:

Choose an answer

Joule

Coulomb

Ampere

Kelvin

hp stands for :

Choose an answer

1w

Horse power

Joule

All are true

More Classes

Other Links

9th Class Physics Chapter 6 Work and Energy English Medium KPK Boards Online Mcqs MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer