2. A 350 kg sofa slides 2.5m down a 30° incline and is kept from accelerating by a woman who is pushing back on it parallel to the incline. If uk .3, calculate (a) the force exerted by the woman on the sofa, (b) the work done by the woman on the sofa, (c) the work done by the friction force, n (d) the work done by gravity, and (e) the net work done on the sofa. (f) Explain why the answer to b) would be different if the sofa was sliding up.

2. A 350 kg sofa slides 2.5m down a 30° incline and is kept from accelerating by a woman who is pushing back on it parallel to the incline. If uk .3, calculate (a) the force exerted by the woman on the sofa, (b) the work done by the woman on the sofa, (c) the work done by the friction force, n (d) the work done by gravity, and (e) the net work done on the sofa. (f) Explain why the answer to b) would be different if the sofa was sliding up.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

How will the velocity change when the acceleration is perpendicular to it? None of the magnitude and direction will change. The magnitude of velocity will change and the direction will not. The direction of velocity will change and the magnitude will not. Both the magnitude and direction will change.
a1 כ5י ۱۰:۳۵ ص bläi 5 The x component of vector A is -30 m and the y component is -19 m. (a) What is the magnitude of A? (b) What is the angle between the direction of A and the positive ?direction of x 32.3 ,35.5 O 33.3 ,35.5 32.3 ,36.5 32.3,38.5 31.3 ,35.5
10 I. A. (B − C) II. (AB) x C III. A. (B x C) IV. AX (B x C) V. A × (B.C) Given that A, B and C are vectors, which of the following are legitimate mathematical operations? I, II, III and IV ONLY O II and IV ONLY O I, III and V ONLY V ONLY All of the above
I need the answer as soon as possible
The force F has a magnitude of 770 N. Express F as a vector in terms of the unit vectors i and j. Identify the x and y scalar components of F. Assume F-770 N, 8-23° Answers: F- i i+ i j) N Fx- i N Fy- i N
if you have two vectors : A=-2i+3j-k B=-i+3j-k find : 1. -3B 2. 2A-3B 3. Direction of A 4. Direction of B
0. If four points whose position vectors are a, b, c, d are coplanar, show that [a b c] = [à à b] + [à à č] + [à b c]
If A = 12 i-16 j and B = 24 i+ 10 j, what is the direction (angle in degree) of the vector C = 2A + B? Select one: a. -78 O b.-41 O c. -51 O d.-24.6
*Multiple choice question Find the speed A. 13 m/s B. 16 m/s C. 14 m/s D. 18 m/s E. 17 m/s F. 15 m /s