A sledge and its rider, with a total mass of 85 kg, emerge fro a downhill track onto a horizontal straight track with an initial speed of 37 m/s. If a force slows them to a stop at a constant rate of `2.0 m//s^(2)`, (a) what magnitude F is required for the force, and (c) what work W is done on them by the force ? What work W is done on them by the force ? What are (d) F, (e) d, and (f) W if they, instead, slow at `4.0 m//s^(2)` ?

Answer

(a) `1.7xx10^(2)N; (b) 3.4xx10^(2)m; (c) -5.8xx10^(4) J; (d) 3.4xx10^(2)N; (e) 1.7xx10^(2)m; (f) -5.8xx10^(4)J`