CBSE Class 8 Science Force and Pressure Worksheet Set A

Read and download free pdf of CBSE Class 8 Science Force and Pressure Worksheet Set A. Download printable Science Class 8 Worksheets in pdf format, CBSE Class 8 Science Chapter 11 Force and Pressure Worksheet has been prepared as per the latest syllabus and exam pattern issued by CBSE, NCERT and KVS. Also download free pdf Science Class 8 Assignments and practice them daily to get better marks in tests and exams for Class 8. Free chapter wise worksheets with answers have been designed by Class 8 teachers as per latest examination pattern

Chapter 11 Force and Pressure Science Worksheet for Class 8

Class 8 Science students should refer to the following printable worksheet in Pdf in Class 8. This test paper with questions and solutions for Class 8 Science will be very useful for tests and exams and help you to score better marks

Class 8 Science Chapter 11 Force and Pressure Worksheet Pdf

FORCE AND PRESSURE
 
Question 1. Give two examples each of situations in which you push or pull to change the state of motion of objects.
Answer- Two examples of push or pull force are as follows:
(i) When we push or pull a box, then its state of motion changes.
(ii) When we push or pull a bicycle, its state of motion changes.
 
Question 2. Give two examples of situations in which applied force causes a change in the shape of an object.
Answer- (i) Squeezing of a plastic bottle changes the shape of the bottle.
(ii) Deformation of clay by pressing it between the hands.
(iii) Making a chapati from a ball of dough.
 
Question 3 Fill in the blanks
 
(a) To draw water from a well we have to pull at the rope.
 
(b) A charged body attracts an uncharged body towards it.
 
(c) To move a loaded trolley we have to pull it.
 
(d) The north pole of a magnet repels the north pole of another magnet.
 
Question 4. An archer stretches her bow while taking aim at the target. She then releases the arrow,which begins to move towards the target. Based on this information fill up the gaps in the statements using the following terms.
Muscular, contact, non-contact, gravity, friction, shape, attraction
 
(a) To stretch the bow, the archer applies a force that causes a change in its  shape .
 
(b) The force applied by the archer to stretch the bow is an example of  Muscular force.
 
(c) The type of force responsible for a change in the state of motion of the arrow is an example of a contact  force.
 
(d) While the arrow moves towards its target, the forces acting on it are due to gravity and that due to  friction  of air.
 
Question 5. In the following statements identify the agent exerting the force and object on which its acts. State the effect of the force in each case.
(a) Squeezing a piece of lemon between the fingers to extract its juice.
(b) Taking out paste from a toothpaste tube.

8th.sci.eng.july.Aug 7

Question 6- A blacksmith hammers a hot piece of iron while making tool. How does the force due to hammering affect the piece of iron?
Answer- The shape of the hot piece of iron changes. It flattens and becomes thinner than earlier. This is the effect of force due to hammering the piece of iron.
 
Question 7. An inflated balloon was pressed against a wall after it has been rubbed with a piece of synthetic cloth. It was found that the balloon sticks to the wall. What force might be responsible for the attraction between the balloon and the wall?
Answer- This is an electrostatic force.
 
Question 8. Name the forces acting on a plastic bucket containing water held above ground level in your hand. Discuss why the forces acting on the bucket do not bring a change in its state of motion.
Answer- A bucket filled with water held above the ground experiences two types of forces:
 
1. Muscular force (acting upwards)
2. Gravity (acting downwards)
These two forces are balanced because they are equal in magnitude but act in opposite directions. So, the net force on the bucket is zero and hence the state of motion of the bucket remains unchanged.
 
Question 9. A rocket has been fired upwards to launch a satellite in its orbits. Name the two forces acting on the rocket immediately after leaving the launching pad.
 
Answer- The two forces acting on the rocket immediately after leaving the launching pad are:
(i) Upward force applied by the rocket engine.
(ii) Downward gravitational force applied by the Earth.
 
Question 10- When we press the bulb of a dropper with its nozzle kept in water, air in the dropper is seen to escape in the form of bubbles. Once we release the pressure on the bulb, water gets filled in the dropper. The rise of water in the dropper is due to
(a) Pressure of water.
(b) Gravity of the earth.
(c) Shape of rubber bulb.
(d) Atmospheric pressure. (✓)
 
ONE MARK MCQs
 
1. Force is a push or pull which helps in changing of an object.
(a) Position    (b) Direction    (c) Shape    (d) All (✓)
 
2. Force acting per unit area is called
(a) Density    (b) Pressure (✓)    (c) Volume    (d) Thrust
 
3. In the adjoining figure at which point is the pressure maximum?

8th.sci.eng.july.Aug 8

(a) At point A   (b) At point B   (c) At point C   (d) At point D (✓)
 
4. Forces acting in the same direction on an object gets …….
(a) Diminished   (b) Divided   (c) Added (✓)    (d) none
 
5. What happens to the speed of an object if the applied force acts in the direction of the motion of the object.
(a) Decreases   (b) Increases (✓)    (c) Remains same     (d) Changes its direction
 
6. What happens to the speed of an object if the applied force acts in the direction opposite to the direction of motion of an object?
(a) Decreases (✓)    (b) Increases    (c) Remains same    (d) All may be true
 
7. What will be the speed of the object if it is at rest?
(a) Infinite    (b) Zero v (✓)    (c) Very High    (d) Very Slow
 
8. Which force/forces act while holding a bucket of water?
(a) Magnetic force    (b) Gravitational force    (c) Muscular force    (d) Both (b) and (c) (✓)
 
9. Why a ball rolling on the floor stops after some time?
(a) Ball becomes light      (b) Due to friction (✓)
(c) Ball becomes heavy    (d) Due to gravitational force
 
10. North pole of a bar magnet repels the north pole of another bar magnet. The force acting is ……..
(a) Non contact force (✓)   (b) Contact force
(c) Gravitational force        (d) Muscular force
 
11. The force exerted by a charged body on another charged or uncharged body is called….
(a) Magnetic force                  (b) Electrostatic force (✓)
(c) Gravitational force           (d) Muscular force
 
12. A coin when dropped left from certain height starts moving towards the earth under the influence of……
(a) Gravitational force (✓)     (b) Muscular force
(c) Magnetic force               (d) Electrostatic force
 
13. A porter carrying a heavy luggage on his head always keeps a round wrap of cloth on his head. Why?
(a) It decreases the weight of luggage    (b) To protect from injury
(c) It increases the area of contact between his head and luggage. (✓)    (d) To Show to the other people.
 
14. What makes a balloon stretch as it is filled with air?
(a) Air becomes lighter inside the balloon.                      (b) Air becomes heavier inside the balloon.
(c) Gas exerts pressure on the walls of container (✓)    (d) All of the above
 
15. Why we do not get crushed under atmospheric pressure exerted by the gases around us?
(a) Because our body is made of bones.
(b) Because pressure inside our body is equal to the atmospheric pressure. (✓)
(c) Because air is very light which can do nothing to our body.    (d) All of the above.
 
16. Why water tanks are always kept on the top of the building?
(a) As it increases the height of of the water column.
(b) Water flows from taps with greater pressure.
(c) Pressure is directly proportional to the height of liquid column
(d) All the above (✓)
 
17. Why is the base of a wall kept wide?
(a) To increase the pressure on the base of wall.   (b) To decrease the pressure on the base of wall. (✓)
(c) To make the wall beautiful.                             (d) All the above
 
18. Choose the correct classification of contact and non contact forces from the following Contact Forces Non Contact Forces

8th.sci.eng.july.Aug 9

19. As shown in the diagram cardboard placed over the top of a glass filled with water when pressed and inverted does not fall. Why?
 8th.sci.eng.july.Aug 8
(a) Glass attracts the cardboard.
(b) Water attracts the cardboard.
(c) Glass and Water both attracts the cardboard
(d) The atmospheric pressure acts on the card board from below and in the upward direction. (✓)
 
20. Why water comes out of the pipes used for water supply through the leakage joints?
(a) Because water always tends to flow out.                                           (b) It is easy for water to flow out.
(c) Because of pressure exerted by water on the walls of the pipe. (✓)     (d) all of the above

            


Questions

              Very Short Answer

Q1)       Define force?

Q2)       How the force of friction arises?

Q3)       How the strength of force is expressed?

Q4)       Define muscular force?

Q5)       How force arises?

            Short Answer

Q6)       How the forces applied on an object?

Q7)       How forces are due to an interaction?

Q8)       What do you mean by state of motion?

Q9)       What happens when two forces acting on the opposite directions are equal?

Q10)     When does the force come into play?

             Long Answer

 Q11)     Distinguish between contact forces and non-contact forces?

Q12)     What are the characteristics of the force?

Q13)     Write short note on friction?

Q14)     State the difference between balanced forces and unbalanced forces?

Q15)     Write short note on muscular force?

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Chapter 03 Synthetic Fibres And Plastics
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Chapter 04 Materials Metals and Non-Metals
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Chapter 05 Coal and Petroleum
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Chapter 06 Combustion and Flame
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Chapter 13 Sound
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Chapter 14 Chemical Effects of Electric Current
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Chapter 15 Some Natural Phenomena
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Chapter 11 Force and Pressure CBSE Class 8 Science Worksheet

The above practice worksheet for Chapter 11 Force and Pressure has been designed as per the current syllabus for Class 8 Science released by CBSE. Students studying in Class 8 can easily download in Pdf format and practice the questions and answers given in the above practice worksheet for Class 8 Science on a daily basis. All the latest practice worksheets with solutions have been developed for Science by referring to the most important and regularly asked topics that the students should learn and practice to get better scores in their examinations. Studiestoday is the best portal for Printable Worksheets for Class 8 Science students to get all the latest study material free of cost. Teachers of studiestoday have referred to the NCERT book for Class 8 Science to develop the Science Class 8 worksheet. After solving the questions given in the practice sheet which have been developed as per the latest course books also refer to the NCERT solutions for Class 8 Science designed by our teachers. After solving these you should also refer to Class 8 Science MCQ Test for the same chapter. We have also provided a lot of other Worksheets for Class 8 Science which you can use to further make yourself better in Science.

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