A box of mass 12 kg is pulled at a constant velocity with a cord that makes the angle 32 degrees as shown in the sketch. If the coefficient of kinetic friction between box and the surface at which it is sliding on is 0.21, and tension in the string is 13 N, what is the value of kinetic friction force? (Note: Use g = 10 m/s^2 and round answer to two %3D significant figures. Learn about sig. fig. in Section 1.3 of book or from provided handout ) velocity = constant T

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Kim is on a sled. She weighs 85.3 kilograms.  The sled rests on a friction-less surface. Coco is pulling the sled at an angle of 35.9 degrees above the horizontal. Find the force, in newtons, needed to be exerted by Coco to maintain Kim’s acceleration at 5.1 m/s2. (use 9.81m/s squared for acceleration, and round of the answer into 4 decimal places)

The figure(Figure 1) shows a block (mass mA ) on a rough horizontal surface, connected by a thin cord that passes over a pulley to a second block (mB), which hangs vertically. If mA is 50Kg and mB is 30kg , in case the kinetic friction Coefficient is 0.25 what is the acceleration. Use Newton’s 2nd Law to find the formula for acceleration first. thanks Write the appropriate Formulas____________________   Plug in the given data with their units _______________   Solve for the unknown __________________________   Box the Final Answer with it’s unit __________________ E) Show all forces applied to mA & mB with directions and point at which it was applied to

Forces of 60 N at 170 degrees, and 40 N at an angle of 220 degrees, measured counter-clockwise from the positive x- axis, act on an object. What are the components (F1x, F1y) of the first force force (in Newtons)? Submit Answer Tries 0/2 What are the components (F2x, F2y) of the second force force (in Newtons)? Submit Answer Tries 0/2 What are the components (Fx, Fy) of the resultant force (in Newtons)? Submit Answer Tries 0/2 What is the magnitude of the resultant force (in Newtons)? Submit Answer Tries 0/2 What is the angle of the resultant force with respect to x-axis? (positive values only) Submit Answer Tries 0/2

#1) Use Newton's Second Law Analysis to solve the following problem. , 1 - sketch and FBDs, 2 - write 0 down force equations in all dimensions, and 3 solve for requested variable. Two boxes, connected by a rope, are at equilibrium (need to consider friction on the incline). Box B is not touching the incline, it is just hanging from the outer rim of the pulley. Assume the magnitude of the tension force is greater than the magnitude of the wx component of mass A for part A (this should help you determine the direction of the static friction force). Draw the FBD for both box A and box B separately. Use N, for Normal Force, use fs for the static friction force, use proper variations of wx and wy for the weight components (two masses here, so they should have different labels not just wx and wy for both, you need to be able to tell them apart), and use T for the Tension Force. Somewhere in your work show what your variations of the magnitudes of wx and wy are in terms of the masses and g…

Figure shows the velocity graph of a 65 kg student in an elevator. What is the student's apparent weight (magnitude only) at t = 7.0 s, in Newtons? Use g = 10.0 m/s². (Hint: What is the net force?) Your answer needs to have 2 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement. Vy (m/s) 8- 4- (s) 10 4. 6. 8.

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A 150 lb box sits on a smooth horizontal surface, while a second downward force of 35 lbs is also applied to th box. On the diagram below, sketch the force vectors acting on the box and determine the magnitude and direction of the Normal force.

A block is pushed up a ramp and is observed to accelerate up the block as is shown in the figure below.  The friction coefficient between the block and the ramp is mu. Write an expression for the acceleration of the block in terms of F, theta, m, g and mu.