PHC4Test2006 - Physics Honors x t v t Test: Chapter 4 1 2...

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Physics Honors Test: Chapter 4 FORM 1 DO NOT WRITE ON THIS TEST. REPORT ALL ANSWERS TO 3 SIGNIFICANT FIGURES . VECTOR ANSWERS MUST HAVE MAGNITUDE AND DIRECTION . USE SCIENTIFIC NOTATION WHEN APPROPRIATE t x v = t v a = at v v o f + = ax v v o f 2 2 2 + = 2 2 1 at t v x o + = 2 2 1 at t v x f - = ( 29 o f avg v v v + = 2 1 t v x avg = a F m = Σ N s fs F μ F N k fk F μ F = g = 9.8 m/s 2 [D] A car with a mass of 1100 kg is being pulled by a tow truck. The tow truck pulls the car to the north with a constant 1200 N force, while a friction force pushes the car towards the south. Starting from rest, the truck pulls the car 60 meters toward the north in 25 seconds. 1) What is the magnitude of the friction force acting on the car? A horizontal 100-N force is applied to a 20-kg box that is initially at rest on the floor. The coefficient of static friction between the box and the floor is 0.40, and the coefficient of kinetic friction between the box and the floor is 0.35. 2)
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This note was uploaded on 02/10/2012 for the course PHYS 123 taught by Professor Phys123 during the Spring '10 term at Buena Vista.

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