When a bicyclist stops pedaling while riding on level ground, the bike will coast along and eventually stop moving. What causes this to happen?

A.
frictional force

B.
gravitational force

C.
There is no longer an applied force.

D.
The forces on the bike are balanced.

Find an expression for the electric field e⃗ at the center of the semicircle. hint: a small piece of arc length δs spans a small angle δθ=δs /r, where r is the radius. express your answer in terms of the variables q, l, unit vectors i^, j^, and appropriate constants.