Posted by **Bella** on Saturday, February 21, 2009 at 1:30pm.

there are 3 parts to my question. i need help on the last part.

1.a. A child rides a bike in a circular path with a radius of 2.0 m. The tangential speed of the bike is 2.0 m/s. The combined mass of the bike and the child is 43 kg. What is the magnitude of the bike's centripetal acceleration?

i got 2.0 m/s^2

b., What is the magnitude of the centripetal force on the bike?

i got 86 N

c. What kind of force provides the centripetal force on the bike?

i don't know,... gravitational force, friction, air resistance, or normal force

thanks for the help!

- physics -
**drwls**, Saturday, February 21, 2009 at 2:57pm
c. A centripetal friction force on the wheels, applied at the ground and perpendicular to the direction of motion, provides the force that keeps the bike going in a circle

Spokes provide the centripetal force toward the axle of the wheel, but they did not ask for that.

- physics -
**Bella**, Saturday, February 21, 2009 at 3:04pm
so friction

- physics -
**drwls**, Saturday, February 21, 2009 at 3:13pm
Friction in a particular sideways direction. There is also forward/backward friction when accelerating, decelerating or climbing hills

## Answer This Question

## Related Questions

- Physics - i have been asking physics questions on this and some people give me ...
- 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 ...
- Physics - A bicyclist is riding at a tangential speed of 13.9 m/s around a ...
- sciencce - Mrs. Scheib was riding her bike and leaves home and rides due east ...
- Physics - What is the centripetal acceleration of a skater moving with a ...
- physics help - An auto race is held on a circular track. A car completes one lap...
- Physics I (Classical) - At some instant, a particle traveling in a horizontal ...
- Physics - Bob rides his bicycle on a bike path that is 75 kilometers long to get...

More Related Questions