Friday

December 19, 2014

December 19, 2014

Posted by **Martin** on Tuesday, April 16, 2013 at 1:17am.

Assumptions: Start time at t = 0 and ignore air resistance. Recall that the height function is given by

y(t)= y0 + v0t - 16t^2

where y0 is the initial height of the supplies (in feet) and v0 is the initial

velocity of the supplies (in feet per second).

a) Since the supplies are dropped from a

stationary helicopter, what is the initial velocity of the supplies? How does this simplify the height equation?

b) Using the fact that the supplies hit the ground with a velocity of -160 feet per second, when do the supplies hit the ground?

c) Using previous parts, how high above the ground was the helicopter initially when the supplies were dropped?

- Math/ Calculus Help1 -
**Steve**, Tuesday, April 16, 2013 at 11:43ama) v0=0, so y(t) = y0-16t^2

b) v(t) = -32t, so solve for t when v=-160

c) now plug that t into y(t)=0 to get y0

- Math/ Calculus Help1 -
**Angela**, Tuesday, April 16, 2013 at 10:29pmThank you Steve,

However, I still don't get your instructions for b) and c)

**Answer this Question**

**Related Questions**

Maths/ Calc - Supplies are dropped from a stationary (not moving up or down) ...

Calculus - A rescue helicopter drops a crate of supplies from a height of 160 ...

Physics - A helicopter is lifting off from the ground and is moving vertically ...

Physics - A helicopter is lifting off from the ground and is moving vertically ...

Physics - From a helicopter rising vertically with a velocity of 9 m/s a weight ...

math - The height, in feet, of a free]falling object t seconds after being ...

math - The height, in feet, of a free-falling object t seconds after being ...

math - the height, in feet, of a free-falling object t seconds after being ...

PHYSICS :( - A helicopter is lifting off from the ground and is moving ...

physics - The pilot of an airplane traveling 240 km/h wants to drop supplies to ...