Homework Help: physics

Posted by Anonymous on Friday, September 18, 2009 at 8:02pm.

A helicopter is flying in a straight line over a level field at a constant speed of 6.2 m/s and at a constant altitude of 11.4 m. A package is ejected horizontally from the helicopter with an initial velocity of 12.0 m/s relative to the helicopter, and in a direction opposite the helicopter's motion. What angle does the velocity vector of the package make with the ground at the instant before impact, as seen from the ground?

physics - MathMate, Friday, September 18, 2009 at 9:08pm
The following calculations assume no air resistance.
Calculate the vertical component of velocity v at impact from the vertical distance S=-11.4 m, a=-g=-9.8 m/s/s, and initial velocity u=0 (package ejected horizontally) from
v²-u²=2aS

The horizontal component of velocity (h) at impact is the same as at ejection, namely 6.2-12=5.8.

The angle with the horizontal is tan^-1(v/h)
=tan^-1(v/5.8)

Answer this Question

Related Questions

Physics - A helicopter is flying in a straight line over a level field at a ...
Calculus - a police helicopter is flying at 200 km/hr at a constant altitude of ...
physics - A person walks first at a constant speed of 4.90 m/s along a straight ...
physics - A person walks first at a constant speed of 4.90 m/s along a straight ...
Physics - A car is driven from point A to B at a constant speed of 25.0 m/s ...
college physics - A car is driven from point A to B at a constant speed of 25.0 ...
Physics - A cup of coffee is sitting in an airplane flying at constant speed and...
physics - A person walks first at a constant speed of 4.50 m/s along a straight ...
Physics - A person walks first at a constant speed of 4.70 m/s along a straight ...
physics - A helicopter is flying horizontally at 8.2 m/s and an altitude of 17 m...

For Further Reading

First Name:
School Subject:
Answer: