Work, Force & Energy Worksheet-2

Work, Force & Energy Worksheet-2

 

Multiple-Choice Question:

  1. We feel warmer on rubbing our hands together. It is due to:

(A) Electrostatic force

(B) Gravitational force

(C) Frictional force

 

  1. Which of the following is an example of class-1 lever?

A.             B.                    C.

 

  1. True/False

a.      In the game “Tug of War” people push the rope towards each othe.

b.      A force can change the shape of an object.

c.      Rough surface such as carpet produces less friction.

d.      Heat produced due to electrostatic force can also damages some machine parts.

e.      Crowbar is an example of class-1 lever.

f.       A bottle opener is an example of class-2 lever.

 

Fill in the blanks:

  1. A pull or push applied by a magnet on metals such as iron or another magnet is known as ___.
  2. ___ is said to be done when a force applied on an object it to move in the direction of force.

 

Answer Key:

(11)   (C)

(12)  (A)

(13)  a. False; b. True; c. False; d. False; e. True; f. True

(14)  Magnetic force/Magnetism

(15)  work