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(b) If, when travelling at this maximum speed, the 1000 kg car had struck and remained attached to a stationary vehicle of mass 1500 kg, with what speed would the interlocked vehicles have travelled immediately after collision? Calculate the kinetic energy of the car just prior to this collision and the kinetic energy of the interlocked vehicles just afterwards. Comament upon the values obtained. Explain how certain design features in a modern car help to protect the driver of a car in such a collision. (L)

(b) If, when travelling at this maximum speed, the 1000 kg car had struck and remained attached to a stationary vehicle of mass 1500 kg, with what speed would the interlocked vehicles have travelled immediately after collision? Calculate the kinetic energy of the car just prior to this collision and the kinetic energy of the interlocked vehicles just afterwards. Comament upon the values obtained. Explain how certain design features in a modern car help to protect the driver of a car in such a collision. (L)

College Physics
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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A60 (a) A cur of mass 1000 kg is initiolly at rest. It moves along a straight road for 20 s and then comes to rest again. The speed-time graph for the movement is: vims 20 10 10 15 20 ts (i) What is the total distance travelled? (ii) What resultant force acts on the car during the part of the motion represented by CD? (ii) 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.
Transcribed Image Text:A60 (a) A cur of mass 1000 kg is initiolly at rest. It moves along a straight road for 20 s and then comes to rest again. The speed-time graph for the movement is: vims 20 10 10 15 20 ts (i) What is the total distance travelled? (ii) What resultant force acts on the car during the part of the motion represented by CD? (ii) 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.
(iv) During the part of the motion represented by OB on the graph, the constant resultant force found in (iii) is acting on the moving car although it is inoving through air. Sketch a graph to show how the driving force would have to vary with time to produce this constant accel- eration. Explain the shape of your graph. (b) If, when travelling at this maximum speed, the 1000 kg car had struck and remained attached to a stationary vehicle of mass 1500 kg, with what speed would the interlocked vehicles have travelled immediately after collision? Calculate the kinetic energy of the car just prior to this collision and the kinetic energy of the interlocked vehicles just afterwards. Comment upon the values obtained. Explain how certain design features in a modern car help to protect the driver of a car in such a collision. [L]
Transcribed Image Text:(iv) During the part of the motion represented by OB on the graph, the constant resultant force found in (iii) is acting on the moving car although it is inoving through air. Sketch a graph to show how the driving force would have to vary with time to produce this constant accel- eration. Explain the shape of your graph. (b) If, when travelling at this maximum speed, the 1000 kg car had struck and remained attached to a stationary vehicle of mass 1500 kg, with what speed would the interlocked vehicles have travelled immediately after collision? Calculate the kinetic energy of the car just prior to this collision and the kinetic energy of the interlocked vehicles just afterwards. Comment upon the values obtained. Explain how certain design features in a modern car help to protect the driver of a car in such a collision. [L]
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