CBSE Worksheet for Chapter - 1 Force class 8

CBSE Worksheet for Chapter - 1 Force class 8

Worksheets For class 8

Find CBSE Worksheet for chapter-1 Force class 8

1. CLASS-8
2. BOARD: CBSE
3. PHYSICS Worksheet - 1
4. TOPIC: Force
5. For other CBSE Worksheet for class 8 Science check out main page of Physics Wallah.

SUMMARY

• Force, Effects of force, Definition of force
• Balanced and unbalanced forces, Resultant force
• Types of force – Contact force and Non – Contact force, Mass and Weight

SECTION 1 – OBJECTIVE

1. If a rock is brought from the surface of the moon:
   1. Its mass will change
   2. Its weight will change, but not mass
   3. both mass and weight will change
   4. Its mass and weight will remain the same
2. When an object undergoes acceleration:
   1. Its speed always increases
   2. Its velocity always increases
   3. It always falls towards the earth
   4. A force always acts on it
3. External forces are:
   1. Always balanced
   2. Never balanced
   3. May or may not be balanced
   4. None of these
4. The net force acting on a body of mass 1kg moving with a uniform velocity of 5ms ^-1
   1. 5N
   2. 0.2N
   3. 0N
   4. None of these
5. Which of the following is a non-contact force :
   1. Magnetic force
   2. Frictional force
   3. Impact force
   4. None of these
6. A force can:
   1. Change the direction of a moving body
   2. Change the state of rest or uniform motion of a body
   3. Change the shape of a body
   4. All of the above
7. When a cricket ball strikes the stumps, a force of _____________ uproots the stumps.
   1. pull
   2. push
   3. push or pull
   4. can’t say
8. Force is a:
   1. Vector quantity
   2. Scalar quantity
   3. Both (A) & (B)
   4. None of these
9. A body is moving with certain velocity towards right. A force of 5N is applied on it towards right and force of 6N is applied on it towards left then:
   1. Speed of body increases towards right
   2. Speed of body increases towards left
   3. Speed of body remains the same
   4. Speed of body decreases
10. How much force is required to lift a mass of 100g
    1. 10N
    2. 1N
    3. 100N
    4. 1000N

SECTION 2 – SUBJECTIVE

1. Define Force and state its units?
2. Write any 3 difference between Mass and Weight.
3. When a force of 40N is applied on a body. It moves with an acceleration of 5ms ^-2 . Calculate the mass of the body.
4. It is required to increase the velocity of a scooter of mass 80 kg from 5ms ^-1 to 25ms ^-1 in 2 second. Calculate the force required.
5. A car of mass 1000 kg is moving with a velocity of 10m/s and is acted upon by a forward force of 1000N due to engine and retarding force of 500 N. Calculate the velocity after 10 seconds .
6. A force can change the shape of object. Explain.
7. Differentiate between contact and non- contact force.

Solutions: to worksheet-1 Topic- Force

objective

SUBJECTIVE

1. 3. 8 kg
2. 4. 400 Newton
3. 5. 15 m/s