The first peculiarity of inclined plane problems is that the normal force is not

Question

The first peculiarity of inclined plane problems is that the normal force is not directed in the direction that we are accustomed to. Up to this point in the course, we have always seen normal forces acting in an upward direction, opposite the direction of the force of gravity. An electric-bike of 15 kg moves at a constant speed of 15 km h-1 around a bend of diameter 360m. The electric-bike’s wheels are not steered. A rope is connected to the bike and the center of the bend. Choose one of the following for the tension?

Explanation / Answer

The centripetal force is given by, Fc = mv2/r where m = mass , r is the radius and v is the velocity

m=15kg

v = 15km/h = 4.17m/s

r = 360/2 =180m

Fc = 1.45N

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