Question

What would be the force required to stop a car of mass 1000kg and a loaded truck of a mass 10000kg in 2sec, if they are moving with same velocity of 5m/s square.

Answer 1

LET THE MASS OF CAR = M1.

LET THE MASS OF TRUCK = M2.

GIVEN,

MASS OF CAR (m1) = 1000KG

MASS OF TRUCK (m2) = 10,000KG.

TIME TAKEN(t) = 2 SECS.

INITIAL VELOCITY (u) = 0.

FINAL VELOCITY (v) = 5 M/S.

ACCELERATION (a) = ?

FORCE (F) = ?

BY 1ST EQUATION OF MOTION,

WE GET,

v = u + at

5 = 0 + a X 2

5 = a X 2

5/2 = a

2.5 = a

OR ,

a = 2.5 m/s2.

NOW,

FORCE REQUIRED TO STOP A CAR,

F = m1 X a

= 1000 X 2.5

= 2500.0

= 2500 N.

NOW,

FORCE REQUIRED TO STOP A TRUCK,

F = m2 X a

= 10,000 X 2.5

= 25000.0

= 25000 N.

HOPE IT HELPS U...~!!!!!

Answer 2

this answer is correct

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