Question

An object is thrown with an initial velocity of 3 m/s. What is its acceleration at its maximum height?


zero

3 m/s2

9.8 m/s2

Answer 1

or none of the above

Answer 2

At its maximum height, all it's kinetic energy has been converted to gravitational potential energy. There is no acceleration at its apex, no matter what speed it was thrown at. (Otherwise it would never come down!)

Therefore the answer is zero.

Answer 3

this question is very loosely worded but if the ball is being thrown in the vicinity of the earth's surface then gravity will always give it a radial acceleration of \(9.8 m/s^2\).

that applies even if it has a velocity of zero.