## anonymous one year ago NEED ASAP!!! A motorist driving at 25 meters/second decelerates to 15 meters/second. The combined mass of the vehicle and the driver is 1.5 × 10³ kilograms. What is the amount of mechanical work done by the vehicle?

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1. anonymous

You can solve this one using the Work-Energy theorem: $\Delta K = W_{net}$ with $$K$$: the kinetic energy, and $$W_{net}$$ the net work done in the system. you can find $$\Delta K = K_f-K_i=\frac{1}{2}Mv_f^2-\frac{1}{2}Mv_i^2$$ try that!