A physics professor is sitting in the back of a pickup truckplaying catch with a

Question

A physics professor is sitting in the back of a pickup truckplaying catch with a baseball. The pickup truck is travelling at 30m/s on a straight and level highway, and at time t=0 the professorthrows the baseball straight up with a speed of 4m/s. Neglectingair resistance, how high does the baseball rise? I know the answer is 0.82 m but I dont know how to solveit. Please if someone could help it would be greatlyappreciated A physics professor is sitting in the back of a pickup truckplaying catch with a baseball. The pickup truck is travelling at 30m/s on a straight and level highway, and at time t=0 the professorthrows the baseball straight up with a speed of 4m/s. Neglectingair resistance, how high does the baseball rise? I know the answer is 0.82 m but I dont know how to solveit. Please if someone could help it would be greatlyappreciated

Explanation / Answer

The key is that at the highest height its vertical speed iszero. So you can use: .    verticaldirection       vfinal2 = v init2  + 2 a d ,                                    0   = 42   + 2 * -9.8 *h .           h = 16 / 2*9.8 =    0.82 meters

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