Answer to Question #160959 in Mechanics | Relativity for jireh

Question #160959

a ball is thrown from the top of 10m high building with horizontal speed of 5m/s. (a) calculate the time it takes to drop to the floor, (b) its horizontal displacement at the point when it reaches the floor

Expert's answer

a)

y=\dfrac{1}{2}gt^2,

t=\sqrt{\dfrac{2y}{g}}=\sqrt{\dfrac{2\cdot10\ m}{9.8\ \dfrac{m}{s^2}}}=1.43\ s.

b)

x=v_0t=5\ \dfrac{m}{s}\cdot1.43\ s=7.15\ m.

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