The first man jumps in his parachute Does not open. He accelerates at 10 m/s squared for four seconds before the parachute opens

Question

3 years ago

15

how fast is he going just before the parachute opens

1 answer:

malfutka [58] · Answer 1 · 2022-07-14T06:22:58+03:00

The velocity of the parachutist after 4 seconds is 40 m/s (downward)

Explanation:

Before his parachute opens, the man is in free fall, so we can calculate its velocity at time t using the suvat equation:

v = u + at

where

v is the velocity at time t

u is the initial velocity

$a=g=10 m/s^2$ is the acceleration of gravity (taking downward as positive direction)

Assuming he jumps from rest,

u = 0

So, its velocity after t = 4 s is

$v=0+(10)(4)=40 m/s$

And the direction is downward, since the result is positive.

Learn more about free fall:

#LearnwithBrainly