Published by:
CGP EDU Academic Team
Published on: August 21, 2026
A car starts from rest and accelerates at 5 m/s 2 . At t =4 s, a ball is dropped out of a window by a person sitting in the car. What is the velocity and acceleration of the ball at t = 6 s?
(Take, g= 10 m/s 2 )
A
20 
m/s,10 m/s 2
m/s,10 m/s 2
B
20 m/s, 5 m/s 2
C
20 m/s, 0 m/s 2
D
20 
m/s, 0 m/s 2
m/s, 0 m/s 2
Text Solution
Verified by ExpertsThe correct answer is:
Velocity of the car at t = 4 sec is
V x = at = 4 x 5 = 20 m/s
So horizontal velocity = 20 m/s (remain constant)
Vertical velocity at t = 6 sec
i.e. after 2 sec of free fall
V y = gt = 20 m/s
So net velocity = 
m/s
and once it starts falling acceleration is only 'g'
i.e., 10 m/s 2
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