NCERT Class VIII Science Solutions: Chapter 11-Force and Pressure Part 2 (For CBSE, ICSE, IAS, NET, NRA 2022)

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Question 5:

Two objects repel each other. This repulsion could be due to

  1. Frictional force only
  2. Electrostatic force only
  3. Magnetic force only
  4. Either a magnetic or an electrostatic force

Answer: D

Magnetic Force

Question 6:

Which one of the following forces is a contact force?

  1. Force of gravity
  2. Force of friction
  3. Magnetic force
  4. Electrostatic force

Answer: B

Force of Friction

Question 7:

As Showing in Fig is a Water Tank

A water tank has four taps fixed at points A, B, C, and D as shown in Fig. The water will flow out at the same pressure from taps at

  1. B and C
  2. A and B
  3. C and D
  4. A and C

Answer: A

Question 8:

As Showing in Fig is a Brick is Kept

A brick is kept in three different ways on a table as shown in Fig. The pressure exerted by the brick on the table will be

  1. Maximum in position A
  2. Maximum in position B
  3. Maximum in position C
  4. Equal in all cases.

Answer: A

VERY SHORT ANSWER QUESTIONS

Question 9:

A ball of dough is rolled into a flat chapatti. Name the force exerted to change the shape of the dough.

Answer:

Muscular force