A ball is tossed from an upper-story window of a building. Theball is given an i

Question

A ball is tossed from an upper-story window of a building. Theball is given an initial velocity of 8.60 m/s at an angle of 20.0° below thehorizontal. It strikes the ground 5.00s later. a) Find the height from which the ball was thrown.
b) How long does it take the ball to reach a point 10.0 mbelow the level of launching? A ball is tossed from an upper-story window of a building. Theball is given an initial velocity of 8.60 m/s at an angle of 20.0° below thehorizontal. It strikes the ground 5.00s later. a) Find the height from which the ball was thrown.
b) How long does it take the ball to reach a point 10.0 mbelow the level of launching?

Explanation / Answer

given the initial velocity of the ball is U = 8.60 m/s the angle with the horizontal is =20.0o the time taken to hit the ground is t = 5 s so the initial vertical velocity is V = U sin                                                 = ------------- m/s then we have the height H = Vt + 1/2 gt2                                        =------------ m b ) let the time taken be t then we have                     10 m = Vt + 1/2gt2                          plugin the values and solve for t where g is the acceleration due togravity                          plugin the values and solve for t where g is the acceleration due togravity

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