SSC
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The driving force of the engine is bigger than friction and air resistance combined
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There are no forces acting on the bus
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The driving force of the engine is equal to friction and air resistance combined.
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A resultant force is required to keep the bus moving
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Detailed explanation-1: -Newton’s first law: the law of inertia Newton’s first law states that if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force.
Detailed explanation-2: -For example, when a car travels at a constant speed, the driving force from the engine is balanced by resistive forces such as air resistance and friction in the car’s moving parts. The resultant force on the car is zero.
Detailed explanation-3: -It would take an unbalanced force to keep an object in motion. If an object is moving with a constant speed in a circle, then the forces acting upon the object are balanced. If an object is accelerating at a constant rate of acceleration, then the forces acting upon the object are balanced.