Posted by **Sangita** on Friday, December 17, 2010 at 7:12pm.

A 3.79 kg ball is dropped from the roof of

a building 163.8 m high. While the ball is

falling to Earth, a horizontal wind exerts a

constant force of 11.5 N on the ball. It takes 5.77 second to hit the ground.

How far from the building does the ball hit

the ground?

Answer in units of m.

- Physics -
**drwls**, Friday, December 17, 2010 at 7:47pm
The horizontal wind will not affect the time it takes to fall. Get that time (T) from the equation

(1/2) gT^2 = 163.8 m

Whoops, they already told you the time to fall, 5.77 s. It agrees with the above equation.

The sideways acceleration of the ball is

a_x = F/m = 3.03 m/s^2

The horizontal displacement at the ground is

X = (1/2)*a_x*T^2

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