A body of mass 5kg starts from the origin with an initial velocity. If a constant force N acts on the body, the time in which the y -component of the velocity becomes zero isa)5sb)20sc)40sd)80sCorrect answer is option 'C'. Can you explain this answer?

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A body of mass 5kg starts from the origin with an initial velocity

. If a constant force

N acts on the body, the time in which the y -component of the velocity becomes zero is

Correct answer is option 'C'. Can you explain this answer?

Mohit Rajpoot
Jan 18, 2022

Here m = 5kg

∴ u_y = 40 m s^-1 and F_y = -5 N

= 1 m s^-1 v_y = 0
As vy = uy + ayt or 0 = 40-1 x t
∴ t = 40s

Here m = 5kg∴ uy = 40 m s-1 and Fy = -5 N= 1m s-1vy = 0As vy = uy + ayt or 0 = 40-1 x t∴ t= 40s

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Here m = 5kg∴ uy = 40 m s-1 and Fy = -5 N= 1m s-1vy = 0As vy = uy + ayt or 0 = 40-1 x t∴ t= 40s

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