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Force and Laws of Motion

(Worksheet)

Q: Fill in the blanks with suitable choice given in brackets.

**1**: The product of mass and velocity of a body is called __________. (momentum/force)

**2**: The property by the virtue of which an object tends to remain in the state of rest or of uniform motion unless acted upon by some force is called __________. (impulse/ inertia)

**3**: The SI unit of _________ is kilogram meters per second i.e. kg m/s (momentum/ force)

**4**: Momentum is a _________ (scalar/ vector) quantity and is directed along the __________ (direction/ magnitude) of velocity.

**5**: The total momentum of the bullet and the gun before firing would be _________ (zero/ positive / negative) because both of them ar at rest.

**6**: ______ forces cannot produce motion in a body but can its shape. (Balanced / Unbalanced)

**7**: ______ force slows down a moving bicycle when we stop pedaling it. (Frictional / Gravitational)

**8**: When an object is under free fall, the Force of gravity acting on the object is a ________ force. (balanced / unbalanced)

**9**: _________ is the property of bodies to resist a change in their state of rest or motion. (Inertia/ Mass)

**10**: Newton’s _________ of motion is also known as Galileo’s law of inertia. (Ist law/ IInd Law / IIIrd Law)

**11**: Force is a _____ quantity. (vector/ scalar)

**12**: ________ always opposes motion of objects. (Force of friction/ Force of gravity)

**13:**Action and reaction forces act on _________ but they are equal in magnitude. (two different bodies/ same body)

**14**: The velocity with which gun moves in the backward direction is known as the ______ velocity. (recoil, initial )

**15**: Inertia of a body depends on its ________. (mass / velocity)

Answers:

1: momentum

2: inertia

3: momentum

4: vector, direction

5: zero

6: Balanced

7: Frictional

8: unbalanced

9: Inertia

10: Ist law

11: vector

12: Force of friction

13: two different bodies

14: recoil

15: mass

in no. 6 after can it should be change

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