The mass of a cyclist including the bicycle is 90 kg. If the speed of a bicycle increases from 6 km/h to 12 km/h...

The mass of cyclist together with the bike is 90 kg. Calculate the increse in kinetic energy if the speed increses from 6.0 km/h to 12 km/h.

Change the speed of 6 m/s into km/h.

The drag force acting on a bicycle is 20 N. what power does a cyclist need in order to travel at 18 km/h ?

A boy climbs up a hill, which rises 1 in every 25, on his bicycle. The mass of the boy and his bicycle is 120 kg. What is the power applied by the body if he is cycling at the rate of 6 km/h hour? (Assume the friction is absent and g=10m//s^(2) )

What is the change in momentum of a car weighing 1500 kg when its speed increases from 36 km/h to 72 km/h uniformly?

A boy on a bicycle pedals around a circle of 22 m radius at a speed of 10m/s. The combined mass of the boy and the bicycle combined mass of the boy and the bicycle is 80 kg. (a) What is the centripetal force exerted by the pavement on the bicycle? (b) What is the upward force exerted by the pavement on the bicycle? See fig.