# NCERT solutions for Science Exemplar Class 8 chapter 11 - Force [Latest edition]

## Chapter 11: Force

Multiple Choice Questions [Pages 61 - 63]

### NCERT solutions for Science Exemplar Class 8 Chapter 11 Force Multiple Choice Questions [Pages 61 - 63]

Multiple Choice Questions | Q 1. | Page 61

In figure, 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?

• Magnitude of force applied by A is greater than that of B

• Magnitude of force applied, by A is smaller than that of B

• Net force on the block is towards A

• Magnitude of force applied by A is equal to that of B

Multiple Choice Questions | Q 2. | Page 61

In the circuit shown in figure, when the circuit is completed, the hammer strikes the gong. Which of the following force is responsible for the movement of hammer?

• Gravitational force alone

• Electrostatic force alone

• Magnetic force alone

• Frictional force alone

Multiple Choice Questions | Q 3. | Page 62

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

• force of gravity

• electrostatic force

• force of friction

• magnetic force

Multiple Choice Questions | Q 4. | Page 62

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

• Pressure at A > Pressure at B > Pressure at C

• Pressure at A = Pressure at B = Pressure at C

• Pressure at A < Pressure at B > Pressure at C

• Pressure at A < Pressure at B < Pressure at C

Multiple Choice Questions | Q 5. | Page 62

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

• frictional force only

• electrostatic force only

• magnetic force only

• either a magnetic or an electrostatic force

Multiple Choice Questions | Q 6. | Page 62

Which one of the following forces is a contact force?

• Force of gravity

• Force of friction

• Magnetic force

• Electrostatic force

Multiple Choice Questions | Q 7. | Page 63

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

• B and C

• A and B

• C and D

• A and C

Multiple Choice Questions | Q 8. | Page 63

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

 (A) (B) (C)
• maximum in position A

• maximum in position C

• maximum in position B

• equal in all cases

Very Short Answer Questions [Pages 63 - 64]

### NCERT solutions for Science Exemplar Class 8 Chapter 11 Force Very Short Answer Questions [Pages 63 - 64]

Very Short Answer Questions | Q 9. | Page 63

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

Very Short Answer Questions | Q 10. | Page 63

Where do we apply a force while walking?

Very Short Answer Questions | Q 11. | Page 64

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?

Very Short Answer Questions | Q 12. | Page 64

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

Very Short Answer Questions | Q 13. | Page 64

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

Very Short Answer Questions | Q 14. | Page 64

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

Very Short Answer Questions | Q 15. | Page 64

Does the force of gravity act on dust particles?

Very Short Answer Questions | Q 16. | Page 64

A gas filled balloon moves up. Is the upward force acting on it larger or smaller than the force of gravity?

Very Short Answer Questions | Q 17. | Page 64

Does the force of gravitation exist between two astronauts in space?

Short Answer Questions [Pages 64 - 66]

### NCERT solutions for Science Exemplar Class 8 Chapter 11 Force Short Answer Questions [Pages 64 - 66]

Short Answer Questions | Q 18. | Page 64

A chapatti maker is a machine which converts balls of dough into chapattis. What effect of force comes into play in this process?

Short Answer Questions | Q 19. | Page 65

Figure shows a man with a parachute. Name the force which is responsible for his downward motion. Will he come down with the same speed without the parachute?

Short Answer Questions | Q 20. | Page 65

Two persons are applying forces on two opposite sides of a moving cart. The cart still moves with the same speed in the same direction. What do you infer about the magnitudes and direction of the forces applied?

Short Answer Questions | Q 21. | Page 65

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

Short Answer Questions | Q 22. | Page 65

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

Short Answer Questions | Q 23. | Page 65

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

Short Answer Questions | Q 24. | Page 66

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

Long Answer Questions [Pages 66 - 67]

### NCERT solutions for Science Exemplar Class 8 Chapter 11 Force Long Answer Questions [Pages 66 - 67]

Long Answer Questions | Q 25. | Page 66

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.

Long Answer Questions | Q 26. | Page 66

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

Long Answer Questions | Q 27. | Page 66

Two rods of the same weight and equal length have different thickness. They are held vertically on the surface of sand as shown in figure. Which one of them will sink more? Why?

Long Answer Questions | Q 28. | Page 67

Two women are of the same weight. One wears sandals with pointed heels while the other wears sandals with flat soles. Which one would feel more comfortable while walking on a sandy beach? Give reasons for your answer.

Long Answer Questions | Q 29. | Page 67

It is much easier to burst an inflated balloon with a needle than by a finger. Explain.

Long Answer Questions | Q 30. | Page 67

Observe the vessels A, B, C and D as shown in figure carefully.

 300 mL 50 mL 500 mL 60 mL A B C D

## NCERT solutions for Science Exemplar Class 8 chapter 11 - Force

NCERT solutions for Science Exemplar Class 8 chapter 11 (Force) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the CBSE Science Exemplar Class 8 solutions in a manner that help students grasp basic concepts better and faster.

Further, we at Shaalaa.com provide such solutions so that students can prepare for written exams. NCERT textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

Concepts covered in Science Exemplar Class 8 chapter 11 Force are Force, Factors Affecting Liquid Pressure, Force - Push or Pull, Forces Are Due to an Interaction, Effect of Force, Types of Force: Contact Force, Types of Force: Non-Contact Force, Thrust and Pressure, Liquid Pressure, Exploring Forces, A Force Can Change the State of Motion, Force Can Change the Shape of an Object, Atmospheric Pressure.

Using NCERT Class 8 solutions Force exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in NCERT Solutions are important questions that can be asked in the final exam. Maximum students of CBSE Class 8 prefer NCERT Textbook Solutions to score more in exam.

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