2 Exam2PHYS211Summer2011

# 2 - Exam 2 Problem 1 Description The figure shows an acceleration-versus-force graph for three objects pulled by rubber bands The mass of object 2

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Exam 2 Problem 1 Description: The figure shows an acceleration-versus-force graph for three objects pulled by rubber bands. The mass of object 2 is 0.11 kg. . Part A What is the mass of object 1? ANSWER: M 1 = Part B What is the mass of object 3? ANSWER: M 3 = Part C Explain your reasoning. Essay answers are limited to about 500 words. ANSWER:

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Problem 2 Part A A car has a maximum acceleration of 6.8 m/s 2 . What will the maximum acceleration be if the car is towing another car of the same mass? ANSWER: a = Problem 3 The figure shows two forces acting on an object at rest. Part A Redraw the diagram, then add a third force that will cause the object to remain at rest. Label the new force F 3 .. Draw the force vector with its tail at the dot. ANSWER:

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Problem 6 A constant force is applied to an object, causing the object to accelerate at 10 m/s 2 . Part A What will the acceleration be if the force is halved? ANSWER: a = Part B What will the acceleration be if the object's mass is halved? ANSWER: a = Part C What will the acceleration be if the force and the object's mass are both halved? ANSWER: a = Part D What will the acceleration be if the force is halved and the object's mass is doubled? ANSWER: a = Problem 7 A skier is sliding down a 15 o slope. Friction is not negligible. Part A Identify the forces on the skier. ANSWER:
Problem 8 A football player at practice pushes a 70 kg blocking sled across the field at a constant speed. The coefficient of kinetic friction between the grass and the sled is 0.30. Part A

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## This note was uploaded on 07/11/2011 for the course PHYS 225 taught by Professor Bacon during the Summer '09 term at Ferris State.

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2 - Exam 2 Problem 1 Description The figure shows an acceleration-versus-force graph for three objects pulled by rubber bands The mass of object 2

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