Per5_exercise

# Per5_exercise - Solutions to Period 5 Exercises E.1 Which...

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Solutions to Period 5 Exercises E.1 Which of the following is TRUE? a) The strong force is not a fundamental force. b) The electromagnetic force is not a fundamental force. c) The weak force is not a fundamental force. d) The frictional force is not a fundamental force. e) All of the above are not fundamental forces. E.1 = d The frictional force is not a fundamental force. 5-Ex 1

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E.2 A bicycle and its rider have a combined mass of 80 kg. What horizontal force is necessary for the bike and rider to achieve an acceleration of 3 m/s 2 ? (Neglect the force of friction.) a) 240 newtons b) 77 newtons c) 27 newtons d) 3 newtons e) 0 newtons F = M a = 80 kg x 3 m/s 2 = 240 kg m/s 2 = 240 N E.2 = a 5-Ex 2
E.3 When you slow down your car by applying the brakes, what happens to the mechanical energy of motion of your car? a) It is stored as chemical energy in the car’s battery. b) It is converted into thermal energy through friction. c)

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## This note was uploaded on 06/11/2011 for the course PHYSICS 103 taught by Professor Staff during the Spring '10 term at Ohio State.

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Per5_exercise - Solutions to Period 5 Exercises E.1 Which...

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