5) A moving 2 kg object has an initial velocity of 10 m/s. It comes to a stop on a rough surface after travelling a distance of 5m. Calculate: a) the kinetic energy of the subject b) the frictional force acting on the object c) the heat energy produced
5) A moving 2 kg object has an initial velocity of 10 m/s. It comes to a stop on a rough surface after travelling a distance of 5m. Calculate: a) the kinetic energy of the subject b) the frictional force acting on the object c) the heat energy produced
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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Help me from questions 5 to 8, please?
Transcribed Image Text:5) A moving 2 kg object has an initial velocity of 10 m/s. It comes to a stop on a rough
surface after travelling a distance of 5m. Calculate:
a) the kinetic energy of the subject
b) the frictional force acting on the object
c) the heat energy produced
6) The temperature of 10 kg of a substance rises by 55°C when heated. Calculate the
temperature rise when 22 kg of the substance is heated with the same quantity of heat.
7) A 100 W electric heater is used to heat 4 kg of olive oil for 10 minutes. Assuming that
there is no loss of heat, calculate the temperature rise of the olive oil. The specific heat
capacity of olive oil is 1890 J/kg °C.
8) 200 g of hot water at 80 °C is mixed with 100 g of cold water at 20 °C. Calculate the final
temperature of the water solution.
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