ICSE Class 8 Answered
A car of mass 1000kg is moving with a certain speed when a constant breaking force of 1000 N acts on it for 5 seconds and the speed of car reduces to half its original speed. Find the further time required to stop the car if the same constant force acts.
Asked by mkp400 | 17 Dec, 2017, 12:26: PM
Expert Answer
Retardation = Force/mass = 1000 N/ 1000 kg = 1 m/s2
in 5 seconds initial speed v0 reduces to (v0/2). then 
now the speed is (25/22) m/s. Required time to stop the car completely is given by
Answered by | 17 Dec, 2017, 01:32: PM
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