Page 118 - Viva ICSE Science 4 : E-book

5. A magnet has two poles—the ____________ pole and the ____________ pole.

6. The ____________ force either slows down or completely stops the object
from moving.

B. Mark (T) for true and (F) for false statements.

1. On pulling, an object will move away from us.

2. Force can move an object that is at rest.

3. Frictional force is experienced more on smooth surface than on
rough surface.

4. Magnet can pull materials like plastic and paper towards itself.
5. Friction always acts in the direction opposite to the direction of

the moving object.

6. We push the rope in the game of tug-of-war.

C. Name the following.

1. The fi rst person to discover gravitational force ______________

2. A material that a magnet can attract ______________
3. An act of moving an object forward by applying force

on it ______________

4. The force that pulls down every object towards the
centre of the earth ______________

5. The force exerted by a surface when an object
moves across it ______________

6. The force applied by the muscles of human body ______________

D. Match the following.

Column A Column B

1. Kicking a football (a) frictional force

2. An apple falling from tree (b) magnetic force

3. Iron nails sticking to the magnet (c) muscular force

4. Ball rolling and stopping on (d) gravitational force
a rough surface

104