 # Chapter 4 5 Problems 202213.pdf - Chapter 4 5 : Forces –...

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Chapter 4, 5 : Forces – Questions and ProblemsPRACTICE WITH VECTORS, TO DO ON YOUR OWNExercise 1: Three forces act on an object:F1=[5.00.0]N,F2=[0.06.0]NandF3=[4.00.0a) Draw a force diagramb) Calculate the net forceΣc) Find the direction of the acceleration vector,a. Add the acceleration vector to the diagram.d) The three forces are applied for 5.0 seconds. Calculate the change in linear momentum,Δ ⃗e) The three forces are applied for 10.0 seconds. Calculate the change in linear momentum,Δ ⃗f) The three forces are applied for 2.0 seconds. The initial linear momentum ispi=[0.010.0]kg.m/. Calculate the final momentum,pf. Draw the initial and final momenta on the diagram.]NFppsAnswers:[1.06.0]N ;[5.030]kg.m/s;kg.m/s;[2.022]kg.m/sExercise 2: Draw a force-acceleration diagram in the following casesa) A one-tonne elevator is pulled by an upward 30.0 kN tension force. (1 tonne = 1 000 kg)b) A 203.9 kg car drives on a horizontal highway, to the right, at a constant speed. Air drag is 5.0kN to the left.Exercise 3: Four forces are acting on an object :F1=[5.02.0]NF2=[3.02.0]F3=[6.02.0]NF4=[2.01.0]Na) Calculate the net forceΣb) Draw a force acceleration diagramc) Knowing that the initial momentum of the object ispi=[5.00.0]kg.m/sand the final momentumispf=[13.09.0]kg.m/s, calculate the time it took to change the momentum.Ans: 3.0 s.Exercise 4: A block (of mass 4.0 kg) is held using four forces of magnitudesT1=10.0N ;T2=12.0N ;T3=8.80NandT4.T3is horizontal.a) What is the net force acting on the block, in terms ofT4b) CalculateT4c) CalculateT4and the direction angle ofT4NF?..o1
Chapter 4, 5 : Forces – Questions and ProblemsCONCEPTUAL QUESTIONS TO DO ON YOUR OWN (REVIEW)#C3. Is inertia always the same thing as mass?#C4. What is weight?#C5.Which is correct?

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Term
Fall
Professor
JoseAguirre
Tags
Skiing, 1 00 m, 9 80 m, 1 00 kg, 0 500 M
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