Question

asked 2021-05-14

asked 2021-03-26

A helicopter carrying dr. evil takes off with a constant upward acceleration of \(\displaystyle{5.0}\ \frac{{m}}{{s}^{{2}}}\). Secret agent austin powers jumps on just as the helicopter lifts off the ground. Afterthe two men struggle for 10.0 s, powers shuts off the engineand steps out of the helicopter. Assume that the helicopter is infree fall after its engine is shut off and ignore effects of airresistance.

a) What is the max height above ground reached by the helicopter?

b) Powers deploys a jet pack strapped on his back 7.0s after leaving the helicopter, and then he has a constant downward acceleration with magnitude 2.0 m/s2. how far is powers above the ground when the helicopter crashes into the ground.

a) What is the max height above ground reached by the helicopter?

b) Powers deploys a jet pack strapped on his back 7.0s after leaving the helicopter, and then he has a constant downward acceleration with magnitude 2.0 m/s2. how far is powers above the ground when the helicopter crashes into the ground.

asked 2021-04-14

When a helicopter is hovering 1450 m directly overhead, anovserver on the ground measures a sound intensity I. Assume thatsound is radiated uniformly from the helicopter and that groundreflections are negligible. How far must the helicopter fly in astraight line parallel to the ground before the observer measures asound intensity of 0.25I?

asked 2021-04-14

When a helicopter is hovering 1450 m directly overhead, anobserver on the ground measures a cound intensityI. Assume that sound is radiateduniformly from the helicopter and that ground reflections arenegligable. How far must the helicopter fly in a straightline parallel to the ground before the observer measures a soundintensity of .25I (one quarter of I).