Question
Cathleen is dragging a 110 kg trunk across a rough floor at a constant velocity of 5.6 m/s [E] with a horizontal force of 380
Cathleen is dragging a 110 kg trunk across a rough floor at a constant velocity of 5.6 m/s [E] with a horizontal force of 380 N [E].
a. Calculate the coefficient of kinetic friction between the trunk and floor. [2 marks]
b. Mariam decides to help by pulling on the trunk with a force of 150 N [Up]. Will Mariam be helping Cathleen? Explain [2 marks]
c. If Mariam, who is 55 kg, stops pulling and sits on the trunk. What force does Cathleen need to pull now for the trunk to accelerate at 2.0 m/s2? [3 marks]
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Introduction to Electrodynamics
Authors: David J. Griffiths
3rd Edition
978-0138053260, 013805326X, 8120316010, 978-8120316010
