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CBSE Class 9 Answered

WHY DOES A CAR NEEDS TO BE PUSHED HARD ?

Asked by samarthdarole | 18 Nov, 2019, 08:47: AM
Expert Answer
By Newton's first law of motion we know that, 
- A body at rest or in motion will continue to be in state of rest or motion unless it is compelled by an external force to change its state of rest or of uniform motion. 
- The car has large mass and thus large inertia.
- Thus, to move a car from its state of rest, the large unbalanced force must be applied on it. 
Hence, the car must be pushed hard (force applied must be greater than the force of gravity and frictional force acting on it) so as to set it in motion from its rest position. 
Answered by Shiwani Sawant | 18 Nov, 2019, 11:48: AM
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