GK
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It is related to the changing speed of an object.
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It is the distance an object travels in one second.
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It is the force acting on an object divided by the distance it travels in one second.
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It is the force acting on an object when it is near to the Earth.
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Detailed explanation-1: -Expert-Verified Answer. Explanation: accelaration is simply rate of change of velocity means it change both direction and magnitude means speed is changing as speed is magnitude of velocity without direction.
Detailed explanation-2: -Acceleration is the rate of change of velocity. Usually, acceleration means the speed is changing, but not always. When an object moves in a circular path at a constant speed, it is still accelerating, because the direction of its velocity is changing.
Detailed explanation-3: -The change in speed is the final speed minus the initial speed. To find acceleration, divide the change in velocity by the length of time during which the velocity changed. The SI unit for velocity is meters per second (m/s). To find acceleration, velocity is divided by the time in seconds (s).
Detailed explanation-4: -The question states an accelerated motion of object along straight line, this implies a non zero force is acting in the object, which is increasing it’s velocity and speed. However the direction of force is not given so it can’t be determined that it is moving away from earth, hence correct answer is C.
Detailed explanation-5: -A negative acceleration acts opposite to the direction of motion of object and it reduces the velocity, it called retardation.