Homework Help: Physics

Posted by Sam on Monday, September 27, 2010 at 12:46pm.

A ball is tossed straight up into the air with an initial velocity of +15 m/s and at a height (from where it leaves the thrower's hand) of 2.0 m off the ground. Once the ball leaves the thrower's hand, it accelerates at -9.8m/s/s.

a) How much does it take for the ball to hit the ground?

b) What is the highest position reached by the ball?

c) What is the acceleration of the ball at its highest point?

Physics - bobpursley, Monday, September 27, 2010 at 1:47pm
a) h=hi+vi*time - 4.9 t^2
solve for time
b) divide that time by 2, then figure height, same equation.

c) acceleration everywhere is the same, due to gravity.

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