10. A skateboarder with a mass of 30 kg ends up with a final velocity of 7 m/s after a
push of 360 joules of work. What was the skateboarders initial velocity?

5 m/s

Explanation:

The net work is equal to change in kinetic energy hence

where m is the mass of the skateboarder, v is the speed and the subscripts i and v represent initial and final respectively. Substituting 7 m/s for final velocity and 30 for mass m then

science is a systematic and logical approach to discovering how things in the universe work. true to this definition, science aims for measurable results through testing and analysis. science is based on fact, not opinion or preferences. the process of science is designed to challenge ideas through research.

explanation: