Answered

A helicopter above the ground is descending at 3.5m/s. It drops a package from rest (relative to the helicopter). Just before it hits the ground the package is falling at a rate of 13.4m/s relative to the ground. Find the velocity of the package relative to the helicopter.
A. 9.9m/s, up
B. 9.9m/s, down
C. 16.9m/s, down
D, 16.9m/s, up

Answer :

The Answer is B. 9.9m/s, down

Answer:

The velocity of the package relative to the helicopter is 9.9 m/s down.

(B) is correct option

Explanation:

Given that,

Velocity of helicopter = 3.5 m/s

Velocity of package = 13.4 m/s

We need to calculate the velocity of the package relative to the helicopter

Just before hitting the ground

Velocity of package relative to helicopter =  Velocity of package relative to ground - Velocity of  helicopter relative to ground

[tex]v_{p}_{h}=v_{p}_{g}-v_{h}_{g}[/tex]

Put the value into the formula

[tex]v_{p}_{h}=13.4-3.5[/tex]

[tex]v_{p}_{h}=9.9\ m/s[/tex]

Hence, The velocity of the package relative to the helicopter is 9.9 m/s down.

Other Questions