Question

a car of mass 2400 kg moving with a velocity of 20 m per second is stopped in 10 second on applying brakes calculate the tradition and the retardation force

Answer 1

mass(m)= 2400 kg,       initial velocity(u)- 20m/s,   final velocity(v) =0     time taken(t)= 10s         retardation= ?     force=?

we can say thar retardation is negative acceleration

(i)by using first equation of motion,we get

v=u +at

0= 20+aX10

0= 20+10a

-20 = 10a

-20/10= a

-2= a

thus, retardation= 2m/s2

(ii) f= ma

f= 2400 X (-2)

= -4800N

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Answer 2

Hey there!

Given,

Mass = 2400 kg

Inital velocity = 20 m/s

Time = 10 second

Retardation =?

Retarding force =?

Retardation = initial velocity/time

= 20/10

= 2 m/s^2

Retarding force = mass x retardation

= 2400 x 2

= 4800 N

Hope It Helps You!