A food packet is released from a helicopter rising steadily at the speed of 2 ms -1. What is the velocity of the packet after 2 s ? (g = 10 ms -2)

Question

A food packet is released from a helicopter rising steadily at the speed of 2 ms -1. What is the velocity of the packet after 2 s ? (g = 10 ms -2) (A) 18 ms -1 (B) 20 ms -1 (C) 22 ms -1 (D) 98 ms -1

Tardigrade Admin · Accepted Answer

Let us take down as +ve, here, u = -2 ms -1, a = +10 ms -2, t=2 s As v = u+a t ⇒ v = (-2)+(10)(2) v=+18 ms -1

Q. A food packet is released from a helicopter rising steadily at the speed of $2 m s^{- 1}$ . What is the velocity of the packet after $2 s$ ? $(g = 10 m s^{- 2})$

$18 m s^{- 1}$

$20 m s^{- 1}$

$22 m s^{- 1}$

$98 m s^{- 1}$

Let us take down as +ve, here,
$u = - 2 m s^{- 1}, a = + 10 m s^{- 2}, t = 2 s$
As $v = u + a t \Rightarrow v = (- 2) + (10) (2)$
$v = + 18 m s^{- 1}$

Q. A food packet is released from a helicopter rising steadily at the speed of 2ms−1. What is the velocity of the packet after 2s ? (g=10ms−2)

18ms−1

20ms−1

22ms−1

98ms−1