8. [/2 Points] DETAILS OBINPHYS8 3.Q.017. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHEI A spring is stretched by an initial amount from its relaxed state. If the spring is then stretched by three times that amount from its relaxed state, by what factor does the amount of mechanical energy stored in the spring change? PE- Initial 9. [/2 Points] DETAILS OBINPHY58 3.P.001. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHEI A sprinter with a mass of 85 kg reaches a speed of 8 m/s during a race. Find the sprinter's linear momentum (in kg - m/s). (Enter the magnitude.) :1 kg - m/s Need Help