HWProblemSet5

# HWProblemSet5 - (b Are any of the forces applied to m 1...

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Physics 211 Spring 2012 Syracuse University Homework Problem Set 5 p.1 Physics 211 Problem Set 5 Due Friday, 02/24/12 Last Name:___________________________________ First Name _______________ Workshop time or section:___________________TA name or Room # ___________ Please submit your homework on this sheet. If you need more space than is available, please attach additional sheets of paper. 1. A 4 kg object has a velocity of 3m/s along x- direction at t=0s (v i x =3 m/s, v i y =0 m/s). Eight seconds later, its velocity change to v f x =8 m/s, v f y =10 m/s). Assuming the object was subject to a constant total force, find (a) the x- and y- components of force (b) its magnitude 2. Two masses m 1 =2.0 kg, and m 2 =3.0 kg situated on a frictionless, horizontal surface are connected by a light (massless) not stretchable string. A force F=4 N is exerted on m 2 to the right (see below). (a) Draw and label separate free-body diagrams for m 1 and m 2

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Unformatted text preview: . (b) Are any of the forces applied to m 1 equal in magnitude to forces applied to m 2 ? Explain. (c) Draw vectors to show direction of the acceleration of each mass. Are they in the same or opposite direction? Do they have the same or different magnitudes? Block m 1 Block m 2 m 1 T F m 2 Physics 211 Spring 2012 Syracuse University Homework Problem Set 5 p.2 (d) Determine the acceleration of m 1 . (e) Determine the tension in the string. 3. Three blocks (m 1 =2 kg, m 2 =3 kg, m 3 =4 kg) are in contact with each other on a frictionless, horizontal surface as shown below. A horizontal force F=18 N is applied to m 1 . Draw free-body diagrams and mark pairs of forces satisfying 3 rd Newton’s Law. (a) find the acceleration of the blocks (b) find the magnitudes of the net forces on each block (c) find the magnitudes of the contact forces between the blocks Block m 1 Block m 2 Block m 3 m 1 m 2 m 3 F...
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HWProblemSet5 - (b Are any of the forces applied to m 1...

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