A golfer drives her ball from the tee a distance of 240 yards down the fairway in a high arcing shot. When the ball is at the highest point of its flight,

a)its velocity and acceleration are both zero.
b) its velocity is zero but its acceleration is nonzero.
c) its velocity is nonzero but its acceleration is zero.
d) its velocity and acceleration are both nonzero.

I believe it is D because trajectory always has a gravity applied to it and at the maximum height, the velocity of ball is equal to horizontal velocity. Right?

Question

A golfer drives her ball from the tee a distance of 240 yards down the fairway in a high arcing shot. When the ball is at the highest point of its flight,

a)its velocity and acceleration are both zero.
b) its velocity is zero but its acceleration is nonzero.
c) its velocity is nonzero but its acceleration is zero.
d) its velocity and acceleration are both nonzero.

I believe it is D because trajectory always has a gravity applied to it and at the maximum height, the velocity of ball is equal to horizontal velocity. Right?

anonymous · Answer

|dw:1348425700251:dw| You are correct, although its y-component of velocity IS=0, so if it was such a high arcing shot as to come straight up and come back down again, it would be B.