SCIENCE
PHYSICAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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a speed skater moving at a constant speed on a straight track
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a ball moving at a constant speed around a circular track
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a particle moving in a vacuum at a constant velocity.
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a vehicle moving down the street at a steady speed
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Detailed explanation-1: -A ball moving at a constant speed around a circular track is accelerated toward the center of its circular path. This is because an object in a uniform circular motion is accelerated by centripetal acceleration. Hence, option D is correct.
Detailed explanation-2: -Answer and Explanation: When the car is moving around a circular track with constant speed then it has an acceleration directed towards the center of its path because of the centripetal acceleration.
Detailed explanation-3: -Constant acceleration is defined as a change in velocity that does not vary over time. If a car increases its velocity by 20 mph in one minute, then another 20 mph the next, its average acceleration remains constant at 20 mph per minute.
Detailed explanation-4: -A car maintaining a speed of 20 meters per second as it moves in a straight line for 5 seconds is in constant motion.
Detailed explanation-5: -The motion of planets around the sun, vehicles accelerating on the highways, objects in freefall etc. Acceleration describes the motion of objects, that is, whether the velocity is increasing or decreasing or whether it’s just remaining uniform.