Question

a motorbike together with its rider weighs 150 kg.how much work is needed to set its movement at 15 m/s?

Answer 1

Answer on Question #47721, Physics, Mechanics - Kinematics - Dynamics

A motorbike together with its rider weighs 150 kg. How much work is needed to set its movement at 15 m/s?

Work to be done is equal to the change in kinetic energy:

$$W = \frac{m v^{2}}{2}$$

Thus:

$$W = \frac{150 k g \cdot \left(15 \frac{m}{s}\right)^{2}}{2} = 16875 J$$

Answer: Work needed: $W = 16875 J$

http://www.AssignmentExpert.com/