SCIENCE
PHYSICAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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An object moving at 30 m/s takes 5 s to come to a stop. What is the object’s acceleration?
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30 m/s2
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-30 m/s2
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-6 m/s2
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6 m/s2
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Explanation:
Detailed explanation-1: -1 Answer. The object’s acceleration is-6 m/s2 .
Detailed explanation-2: -Ignoring air resistance, it will be g (acceleration due to gravity), 9.81 m/s2 (this is constant whether the ball has fallen for 5 s or 2 s).
Detailed explanation-3: -Hence, the acceleration of car is 0.33 m/s².
Detailed explanation-4: -Acceleration (a) is the change in velocity (v) over the change in time (t), represented by the equation a = v/t.
Detailed explanation-5: -After 5 sec, velocity of the particle is 20 m/s.
There is 1 question to complete.