Please explain how to solve the problem indetail so that it’s understandable. Th

Question

Please explain how to solve the problem indetail so that it’s understandable. This is for my finalsreview. Thank you! 14) When a rock thrown straight upwardsgets to the exact top of its path, its
A) velocity is about 10 m/s and its acceleration iszero. B) velocity is zero and its accelerationis zero. C) velocity is zero and its accelerationis about 10 meters per second per second. D) velocity is about 10 m/s and itsacceleration is about 10 meters per second persecond. E) none of these 15) While a car travels around a circulartrack at a constant speed its
A) inertia is zero. B) acceleration iszero. C) velocity is zero. D) none of theabove Please explain how to solve the problem indetail so that it’s understandable. This is for my finalsreview. Thank you! 14) When a rock thrown straight upwardsgets to the exact top of its path, its
A) velocity is about 10 m/s and its acceleration iszero. B) velocity is zero and its accelerationis zero. C) velocity is zero and its accelerationis about 10 meters per second per second. D) velocity is about 10 m/s and itsacceleration is about 10 meters per second persecond. E) none of these 15) While a car travels around a circulartrack at a constant speed its
A) inertia is zero. B) acceleration iszero. C) velocity is zero. D) none of theabove

Explanation / Answer

reason: at the topmost point the force acting on the rock willremain same and hence the same acceleration...

15.. Option (D)....None of the above..
Reason: in a circular track there is a centifugal force actingon the car and hence an acceleration..Also at any instant it hasgot some velocity..The magnitude of velocity is constant but thedirection is changing all the time..

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