A cyclist is coasting at 14 m/s when she starts down a 440 m long slope that is 30 m high. The cyclist and her bicycle have a combined mass of 70 kg. A steady 13 N drag force due to air resistance acts on her as she coasts all the way to the bottom. Required:
What is her speed at the bottom of the slope?

Explanation:

The initial kinetic energy will be increased by the loss of potential energy and be decreased by the work of friction.

½mv₁² = ½mv₀² + mgh - Fd

½70v₁² = ½(70)14² + 70(9.8)(30) - 13(440)

v₁ =  24.9112... ≈ 25 m/s

a. spokes of a wheel.

as indicated in the question radial contains rad, also found in radius, so the fracture's would span the radius.