A car with mass m = [06] kg is initially traveling directly east with a speed vi = 25.0 m/s. It crashes into the rear end of a truck with mass M = 9000 kg moving in the same direction with speed Vi = 20.0 m/s. Immediately after the collision the car has a speed vf = 18.0 m/s in its original direction. a. What is the speed (m/s) of the truck immediately after the collision? b. How much mechanical energy (J) was lost as a result of the collision?

i think it’s a. this is because if they measured the mass of something with a mass of 150g, then their final answer would have to be approximately 150g. though all of their answers are almost 150, rosa and tran have the closest answers (or the exact answer) to the accurate one.

see earlier answer

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false.

explanation:

this statement is false. after falling for 5 seconds, its speed will not be 100 m/s.