Friday

March 27, 2015

March 27, 2015

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

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 9:46pmaverage 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 ...

Physical Science - A bicycle and its rider together have a mass of 80 kg. If the...

Physical Science - A bicycle and its rider together have a mass of 80 kg. If the...

Physics - Jack rides his 213kg motor cross bike 25.3m up a 30.0 degree slope at ...

Physics - A bicycle and rider travel along a road. Which of the following ...

Physics - A bicyclist is riding at a tangential speed of 13.9 m/s around a ...

Physics - A bicyclist is riding at a tangential speed of 13.9 m/s around a ...

Physics - A bicyclist is riding at a tangential speed of 13.2 m/s around a ...