Question

A car of mass 2400 kg moving with a velocity of 20ms^-1is stoped is 10 s on applying brakes calculate i the retardation and ii the retarding force

Answer 1

Answer:

Mass= 2400 kg

Initial velocity= 20 m/s

Final velocity= 0

Time = 10 s

i. Retardation

= v-u/t

= 0-20/10

= -20/10

= -2 m/s^2

ii. Retarding force

= mass × retardation

= 2400 kg × -2 m/s^2

= -4800 kg m/s^2 or -4800 N.

Thus, retardation is -2 m/s^2 and retarding force is -4800 N.

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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!