CBSE Class 9 Science Force and Laws of Motion Worksheet Set 06

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FORCE AND LAWS OF MOTION
 
SECTION A 
1. Mass of a body is doubled. How does its acceleration change under a given force?
 
2. Why are athletes in high jump event made to fall on a sand bed or on a cushioned bed?
 
3. Name the physical quantity that measures the state of inertia. Write its S.I.unit.
 
4. A ball is thrown vertically upwards. What is its momentum at the highest point?
 
5. Luggage placed on the roof of a car is tied with a rope. Give reason.
 
6. An object of mass 2kg is sliding with a constant velocity of 4 m/s on a frictionless horizontal table. How much force is required to keep the object moving with the same velocity?
 
7. Why are the wheels of vehicle is provided with mud guards?
 
8. Two bodies A and B of same mass are moving with velocities v and 3v respectively.
 
Compare their (i) inertia (ii) momentum (iii) the force needed to stop them in the same time.
 
9. Why does a boat tend to leave the shore, when passengers are alighting from it?
 
10. Why is it difficult for a fireman to hold a hose, which ejects large amount of water at a high velocity?
 
SECTION B 
 
1. A force of 5 N produces an acceleration of 8 m/s2 in mass m1andanacceleration of 24 m/s2 in mass m2 . What acceleration would it give if both masses are tied together?
 
2. A body of mass1000kg moving at a speed of 10m/s reaches the speed of 50m/s in 20s.Calculate the force required to do so.
 
3. A scooter is moving with a velocity of 25 m/s and it takes 5 s to stop after the brakes are applied. If the mass of the scooter along with the rider is 180kg, find the change in momentum in this case.
 
4. A gun of mass500 g fires a bullet of mass 10 g with a speed of 100 m/s. Find the recoil velocity of the gun.
 
5. A bullet of 10g strikes a sand bag at a speed of 1000 m/s and gets embedded after travelling 5cm.Calculate the resistive force exerted by the sand on the bullet and the time taken by the bullet to come to rest.

6. A bullet of mass 4 g when fired with a velocity of 50 m/s can enter a wall up to a depth of 10 cm. How much will be the average resistance offered by the wall?

7. An iron sphere of mass 1 kg is dropped from a height of 10 m. If the acceleration of sphere is 9.8 m/s2 , calculate the momentum transferred to the ground by the ball.
 
8. For how long should a force of 100 N act on a body of mass 20 kg at rest so that it acquires a velocity of 100 m/s?
 
9. Velocity – time graph of a ball of mass 50 g rolling on a concrete floor is as shown in figure. Calculate the acceleration and the frictional force of the floor on the ball.
CBSE Class 9 Science Force and Laws of Motion Worksheet Set F
10. Two objects of masses 100g and 200g are moving along the same line and direction with velocities of 2 m/s and 1 m/s respectively. They collide and after the collision, the first object moves at a velocity of 1.67 m/s. Determine the velocity of second object.

 

Please click on below link to download CBSE Class 9 Science Force and Laws of Motion Worksheet Set F

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Download CBSE Practice Material: Class 9 Science Chapter 08 Force and Laws of Motion

Download Practice Sheet: Chapter 08 Force and Laws of Motion (Class 9 Science)

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Are these Science Class 9 worksheets based on the 2026-27 competency-based pattern?

Yes, our CBSE Class 9 Science Force and Laws of Motion Worksheet Set 06 includes a variety of questions like Case-based studies, Assertion-Reasoning, and MCQs as per the 50% competency-based weightage in the latest curriculum for Class 9.

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Daily practice with these Science worksheets helps in identifying understanding gaps. It also improves question solving speed and ensures that Class 9 students get more marks in CBSE exams.

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