Homework Help: Physics

Posted by Physicster on Saturday, March 13, 2010 at 9:43pm.

A 64 kg bicyclist rides his 7.7 kg bicycle with a speed of 13.5 m/s.

How much work must be done by the brakes to bring the bike and rider to a stop?

How far does the bicycle travel if it takes 4.5 s to come to rest?

What is the magnitude of the braking force?

I know the work in the first question is -6.43366 kJ but I have no idea how to find the distance and force.

Physics - bobpursley, Saturday, March 13, 2010 at 9:46pm
average velocity= 13.5m/s * 1/2
distance= avgvelocity*time

force*distance= initial KE
solve for force.

Answer this Question

Related Questions

Physics - A 70 kg bicyclist rides his 7.8 kg bicycle with a speed of 14 m/s. How...
Physics - A bicyclist is coasting straight down a hill at a constant speed. The ...
Physics - A bicyclist is coasting straight down a hill at a constant speed. The ...
Physics - A bicyclist is coasting down a road that is sloped downward at an ...
Physics - If a bicyclist of mass 68.0 kg (including the bicycle) can coast down...
Physics - A bicyclist makes a trip that consists of three parts, each in the ...
physics - A bicyclist travels in a circle of radius 31.0 m at a constant speed ...
Physics - i have been asking physics questions on this and some people give me ...
Physics/Math - A bicyclist travels in a circle of radius 35.0 m at a constant ...
Physics - this one is kind of hard A bicyclist can coast down a 7.0 degree hill ...

For Further Reading

First Name:
School Subject:
Answer: