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A car starts from rest and accelerates a...

A car starts from rest and accelerates at `5 m/s^2`. At t = 4s, a ball is dropped out of a windown by a person sitting in the car. What is the velocity and acceleration of the ball at t = 6s?

A

20m/s, 0

B

`20sqrt2 m//s , 0

C

`20sqrt2 m//s, 10 m//s^2`

D

`20 m//s , 5m // s^2`

Text Solution

Verified by Experts

The correct Answer is:
C

`v_y g (Delta t) = 10 (6-4) = 20 m//s`
`v = sqrt(v_x^2 + v_y^2) = sqrt((20)^2 +(20)^2) = 20sqrt2 m//s`
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