b) A truck of total mass 18tonne descends a hill with a gradient of 1 in 14, i.e. a vertical movement of 1m for each 14m of movement along the slope. During this motion, the truck experiences a rolling resistance to its motion of 900N. Whilst travelling at a velocity of 54km/h, its brakes are applied, and the truck is brought uniformly to rest in a distance of 112m. During this period of constant deceleration, it may be assumed that the rolling resistance remains constant at 900N, this being in addition to the retarding force applied by the brakes. Calculate for the truck whilst it is slowing down: a) The vertical height through which it descends. b) Its decrease in potential energy. c) Its initial velocity in m/s. d) Its decrease in kinetic energy. e) The work done against the rolling resistance.

b) A truck of total mass 18tonne descends a hill with a gradient of 1 in 14, i.e. a vertical movement of 1m for each 14m of movement along the slope. During this motion, the truck experiences a rolling resistance to its motion of 900N. Whilst travelling at a velocity of 54km/h, its brakes are applied, and the truck is brought uniformly to rest in a distance of 112m. During this period of constant deceleration, it may be assumed that the rolling resistance remains constant at 900N, this being in addition to the retarding force applied by the brakes. Calculate for the truck whilst it is slowing down: a) The vertical height through which it descends. b) Its decrease in potential energy. c) Its initial velocity in m/s. d) Its decrease in kinetic energy. e) The work done against the rolling resistance.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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