I need help with this physics problem?
A 4.33 kg ball is dropped from the roof of
a building 157.2 m high. While the ball is
falling to Earth, a horizontal wind exerts a
constant force of 11.5 N on the ball.
How long does it take to hit the ground?
The acceleration of gravity is 9.81 m/s ^2
Answer in units of seconds
part 2 of 3
How far from the building does the ball hit
Answer in units of m.
part 3 of 3
What is its speed when it hits the ground?
Answer in units of m/s.
- az_lenderLv 71 month ago
(part 1) t = sqrt(2h/g) = around 5 or 6 seconds but use a calculator.
(part 2) The horizontal acceleration "a_x" is
(11.5 N)/(4.33 kg) = around 2.7 m/s^2 but use a calculator. Then find "x", the horizontal distance, from x = (1/2)(a_x)t^2.
(part 3) Final velocity is
-(9.81 m/s^2)t j + (a_x)t I,
and use the Pythagorean Theorem to find the actual speed.