Homework Help: Physics

Posted by Caylee on Monday, September 5, 2011 at 9:58pm.

A helicopter is ascending (moving upwards) at a constant velocity of 8 m/s. At a height of 90m, a passenger opens a window and drops a package to the ground below. How long does it take the package to hit the ground and how fast is it moving just before impact?

Physics - Henry, Wednesday, September 7, 2011 at 5:11pm
d = Vo*t + 0.5gt^2 = 90m,
0 + 0.5*9.8*t^2 = 90,
4.9t^2 = 90,
t^2 = 18.36,
t = 4.29s.

Vf = Vo + gt,
Vf = 0 + 9.8*4.29 = 42m/s.

Answer this Question

Related Questions

physics - A helicopter is ascending (moving upwards) at a constant velocity of 8...
Physics - A helicopter is ascending (moving upwards) at a constant velocity of 8...
Physics - A helicopter is ascending (moving upwards) at a constant velocity of 8...
Physics - A helicopter is ascending (moving upwards) at a constant velocity of 8...
Physics - A helicopter is ascending (moving upwards) at a constant velocity of 8...
Physics - The helicopter in the drawing is moving horizontally to the right at a...
physics - A helicopter is flying in a straight line over a level field at a ...
physics - helicopter at rest, uniformly accelerates upwards. After 25s flare ...
Physics - A helicopter is ascending vertically with a speed of 5.00 m/s. At a ...
Physics - A helicopter is ascending vertically with a speed of 5.20 m/s. At a ...

For Further Reading

First Name:
School Subject:
Answer: