Free help with homework

Why join Brainly?

  • ask questions about your assignment
  • get answers with explanations
  • find similar questions

A motorist travelling at 10m/s was able to bring his car to rest in a distance of 10 meters. If he had been travelling at 40 m/s, in what distance could he

bring his car to rest using the same braking force? (answer in meters)



This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
initial velocity = 10 m/s
final velocity = 0 m/s
distance covered = 10 m
acceleration of the bike, 
2as = v^2-u^2
2(a)(10) = (0)^2-(10)^2
20 a = -100
a = -100/20
a = -5 m/s^2

therefore in the next condition,
initial velocity = 40 m/s
final velocity = 0 m/s
acceleration = -5 m/s^2 ( as mentioned in the question above )
therefore distance traveled by the bike,
2as = v^2-u^2
2(-5)(s) = (0)^2-(40)^2
-10 s = -1600
s = -1600/-10
s = 160 m.
 i hope that  this will help u.

1 5 1
The Brain
  • The Brain
  • Helper
Not sure about the answer?
Learn more with Brainly!
Having trouble with your homework?
Get free help!
  • 80% of questions are answered in under 10 minutes
  • Answers come with explanations, so that you can learn
  • Answer quality is ensured by our experts