A car of mass 100kg is moving with a certain velocity. It is brought to rest by the application of brakes, within a distance of 10m when the average resistance being offered to it is 250N.What was the velocity of the motor car?
Share
A car of mass 100kg is moving with a certain velocity. It is brought to rest by the application of brakes, within a distance of 10m when the average resistance being offered to it is 250N.What was the velocity of the motor car?
Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Answer:
5√2 m/s
Explanation:
m= 100 kg
s= 10 m
f=-250N
initial velocity=?
final velocity=0
acceleration= F/M=-250/100=-2.5m/s2
we have v2-u2= 2as
u2= v2-2as
= 0-2(-2.5)×10 m2/s2
=50 m2/s2
u=√50
u=√25×2
u=5√2m/s