Ncert exemplar solutions science class 8 Solutions for Chapter 7 force and pressure

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

During dry weather, while combing hair, sometimes we experience hair flying apart. The force responsible for this is

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

Fig.11.3 shows a container filled with water. Which of the following statements is correct about pressure of water?

Which one of the following forces is a contact force?

A water tank has four taps fixed at points A, B, C, D as shown in Fig. 11.4. The water will flow out at the same pressure from taps at

A brick is kept in three different ways on a table as shown in Fig. 11.5. The pressure exerted by the brick on the table will be

Where do we apply a force while walking? …………….

In Fig 11.1, two boys A and B are shown applying force on a block. If the block moves towards the right, which one of the following statements is correct?

A girl is pushing a box towards east direction. In which direction should her friend push the box so that it moves faster in the same direction?

In the circuit shown in Fig.11.6, when the key is closed, the compass needle placed in the match box deflects. Name the force which causes this deflection.

During dry weather, clothes made of synthetic fibre often stick to the skin. Which type of force is responsible for this phenomenon?

While sieving grains, small pieces fall down. Which force pulls them down?

Does force of gravity act on dust particles?

Two thermocol balls held close to each other move away from each other. When they are released, name the force which might be responsible for this phenomenon. Explain

Fruits detached from a tree fall down due to force of gravity. We know that a force arises due to interaction between two objects. Name the objects interacting in this case.

A man is pushing a cart down a slope. Suddenly the cart starts moving faster and he wants to slow it down. What should he do?

Fig. 11.8 shows a car sticking to an electromagnet. Name the forces acting on the car? Which one of them is larger?

An archer shoots an arrow in the air horizontally. However, after moving some distance, the arrow falls to the ground. Name the initial force that sets the arrow in motion. Explain why the arrow ultimately falls down.

It is difficult to cut cloth using a pair of scissors with blunt blades. Explain