A package is dropped from a helicopter moving upward at 15m/s. If it takes 10 s before the package strikes the ground, how high

Question

3 years ago

10

A package is dropped from a helicopter moving upward at 15m/s. If it takes 10 s before the package strikes the ground, how high

above the ground was the ground was the package when it was released if air resistance is negligible?
(A) 408 m
(B) 272 m
(C) 204 m
(D) 340 m

Physics

2 answers:

Vlad1618 [11] · Answer 1 · 2021-12-01T09:55:45+03:00

Answer:

A package is dropped from a helicopter moving upward at 15 m/s. If it takes 16.0 s before the package strikes the ground, how high above the ground was the package when it was released? (Disregard air resistance.)

Show step by step please.

Note: The answer is given it's should be 1000 m ??

This what i can up with so see what it is kid

Explanation:

Anni [7] · Answer 2 · 2021-12-01T11:55:43+03:00

Answer:

The right answer is (D) 340m

Explanation:

If the package is dropped from a helicopter moving upward and the air resistance is negligible, the only acting force in the package is the gravity force. Therefore you can consider this as a Vertical Projectile Motion problem.

The initial speed of the package V₀ is 15m/s.

The acceleration of the package G is 9.8m/s².

The initial hight is Y₀. Therefore:

Y(t)=Y₀+V₀·t-0.5·G·t²

But we know than T(10s)=0m

0m=Y₀+150m-490m

Y₀=340m