NCERT Class VIII Science Solutions: Chapter 11-Force and Pressure Part 2

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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

Image of magnetic force

Image of Magnetic Force

Image of 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

Image of Force of friction

Image of Force of Friction

Image of Force of friction

Question 7:

As showing in fig is a water tank

A Water Tank

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

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

Developed by: