A60 (a) A cur of mass 1000 kg is initiolly at rest. Itmoves along a straight road for 20 s andthen comes to rest again. The speed-timegraph for the movement is:vims2010101520 ts(i) What is the total distance travelled?(ii) What resultant force acts on the carduring the part of the motionrepresented by CD?(ii) What is the momentum of the carwhen it has reached its maximumspeed? Use this momentum value tofind the constant resultant acceler-ating force. (iv) During the part of the motionrepresented by OB on the graph,the constant resultant force found in(iii) is acting on the moving caralthough it is inoving through air.Sketch a graph to show how thedriving force would have to vary withtime to produce this constant accel-eration. Explain the shape of yourgraph.(b) If, when travelling at this maximumspeed, the 1000 kg car had struck andremained attached to a stationary vehicleof mass 1500 kg, with what speed wouldthe interlocked vehicles have travelledimmediately after collision?Calculate the kinetic energy of the car justprior to this collision and the kineticenergy of the interlocked vehicles justafterwards. Comment upon the valuesobtained.Explain how certain design features in amodern car help to protect the driver of acar in such a collision.[L]

Recall Displacement=area under v-t graph Force=ma=∆P/∆t

A60 (a) A car of mass 1000 kg is initially at rest. It moves along a straight road for 20s and then comes to rest again. The speed-time graph for the movement is: ims C 20 10 10 15 20 bs (i) What is the total distance travelled? (ii) What resultant force acts on the car during the part of the motion represented by CD? (iii) What is the momentum of the car when it has reached its maximum speed? Use this momentum value to find the constant resultant acceler- ating force.

A60 (a) A car of mass 1000 kg is initially at rest. It moves along a straight road for 20s and then comes to rest again. The speed-time graph for the movement is: ims C 20 10 10 15 20 bs (i) What is the total distance travelled? (ii) What resultant force acts on the car during the part of the motion represented by CD? (iii) What is the momentum of the car when it has reached its maximum speed? Use this momentum value to find the constant resultant acceler- ating force.

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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