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Science Department
Prep.3

Give Reasons:

1. The acceleration of a moving Bec. final speed is greater than
object ispositive.                   initial speed.

2. The body moves by                 Bec. the body which moves with
acceleration can'tmove with          acceleration its speed changes
constant velocity.                   by time.

3. Distance-time graph for an        Bec. object covers equal
                                     distance inequal interval time
object
moves at uniform speed is a
straight linepassing through the
origin point.

4. Speed-time graph for an           Bec. speed of object is constant
                                     as timepasses.
object moves
at regular speed is a straight line
parallelto the time axis.

5. When the driver of a              Bec. speed of car will decrease

moving car uses the brakes, we withtime.
describe the car’s
movement as decelerating motion.

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