(20%) Problem 4: A car of mass 2300 kg collides with a truck of mass 4100 kg at

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(20%) Problem 4: A car of mass 2300 kg collides with a truck of mass 4100 kg at the intersection of horizontal roads. The vehicles stick together and slide immediately after the collision. The x- and y-components of the car's velocity just before the collision are (41, 0) m/s, respectively, and the same components of the truck's velocity just before the collision are (-13, 29) m/s. second second collision. Choose the best explanation of why that is justified 17% Part (a) Calculate the x-component of the velocity of the combined car and truck immediately after the collision, in meters per 17% Part (b) Calculate the i-component of the velocity of the combined car and truck immediately after the collision, in meters per 17% Part (c) In parts (a) and (b) you neglected the effect of external forces including the force of the road. on the vehicles during the 17% Part (d) This collision is highly inelastic. Calculate the loss of total kinetic energy during the collision in Joules Final Grade 100% Correct Answer Student Answer Klost-2767475.6 Kost 2767000 Klost -2768000 Grade Detail Correct Student Feedback Final Answer Credit 100% Submission History Hints Feedback Totals 090 Answer Kost 2767475.6 Klost 2767000 0% 090 Totals 0% 0% 0% 0% ? 1700 Part (e) Find the increase of the internal energy of the car and truck (due to heating and deformation), in joules 1700 Part () In part (e) you assumed that during the collision the energy flow into the system from the surroundings due to a temperature difference is negligible. Choose the statement that best justifies that assumption.

Explanation / Answer

Part e) increase in internal energy is approximately(sound) equal to loss in kinetic energy of the system .

Part f) heat flow from higher temperature to lower temperature spontaneously, in collision deformation causes flow for material and by viscous forces temperature and so the internal energy increases, so lost energy convert firstly in deformation heating and sound from system

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