I’ve tried this problem a bunch of times and I keep getting -.69 but that’s not the right answer.?

Question Details: A toy train is pushed forward and released at x=2.2m with a speed of 1.2m/s. It rolls at a steady speed for 2.3 s, then one wheel begins to stick. The train comes to a stop at 6.0 m from its starting point. What is the train’s acceleration after its wheel begins to stick?

Also I don’t really know how to start this one . . .

A skier is gliding along at 3.0 m/s on horizontal, frictionless snow. He suddenly starts down a 6 degree incline. His speed at the bottom is 15m/s.

a) What is the length of the incline?

b) How long does it take him to reach the bottom?

I’ve tried this problem a bunch of times and I keep getting -.69 but that’s not the right answer.?

I’ve tried this problem a bunch of times and I keep getting -.69 but that’s not the right answer.?

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