A 150-lb crate is released from rest along a 30° inclined plane. The coefficient of kinetic friction between the crate and the plane is uk = 0.3. The crate slides 30 ft down the plane. What is the final velocity of the crate? Solve this problem using three different methods. 1. The equations of motion from Chapter 13. 2. The principle of work and energy from Chapter 14. 3. The principle of linear impulse and momentum from Chapter 15. Note: You should get same answer using the different methods. Show your work and the equations used. Draw a complete FBD for the problem.

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1. Two blocks are connected by a pulley system shown in the figure below. Neglect friction between the block on the left and the ramp sloped at angle 0. Suppose that the block on the left has mass m, and that the block on the right is moving downward at a constant speed v. m Given m, 0, and v, answer the questions below. (a) Find the mass of the block on the right? (b) Find the velocity of the block on the left. (c) If the block on the right was moving at a constant speed v upward, instead of downward, how would your answer to Question la change?

The mass of A is 39 kg and the mass of B is 9 kg .The coefficient of kinetic friction between A and the horizontal surface is u = 0.2. The constant force F causes the system to accelerate. The angle 0 = 22 ° is constant. (Figure 1) Part A Determine F. Express your answer with the appropriate units. HẢ ? F= Value Units Submit Request Answer Figure 1 of 1 Provide Feedback F • B.