12) Draw a labelled free body diagram: A rightward constant force is applied to a book to move it across a desk at constant velocity. Consider frictional forces, Neglect air resistance.
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- 2) A small block of mass m rests on the rough, sloping side of a triangular block of mass M which itself rest on a horizontal table as shown. (a). Draw a free-body diagram for each of the two obiects. (b) Write out Newton's equations of motion for each object in both r and y coordinates. (c) If the coefficient of static friction between the wedge and the table is 0 and the coefficient of static friction between the block and the wedge is M, determine the horizontal force F applied to M that will cause the small block m to start moving up the incline.Problem 3) An aircraft carrier can weight up to 100,000 metric tons (100 million kg) and has a top speed of 30 knots (56 km/h or 15.4 m/s). If the acceleration of the carrier is 0.008 m/s?. a) How long (in seconds) does it take to reach its maximum speed from rest b) What is the thrust force of the nuclear engine in Newtons?A 50-kg traffic light is suspended from two wires making angles of 1=53, and 2 = 37 with thehorizontal axis. Find the tension T1 and T2 on the wires. Note that the values are given to two significantfigures.
- When a parachute opens, the air exerts a large drag force on it. This upward force is initially greater than the weight of the sky diver and, thus, slows him down. Suppose the weight of the sky diver is 986 N and the drag force has a magnitude of 1049 N. The mass of the sky diver is 101 kg. Take upward to be the positive direction. What is his acceleration, including sign? Type to search 7 Number e Textbook and Media Save for Later 2 +6.24 W Ri 3 E C $ 4 " Units R % 5 m/s^2 T V 6 & 7 7 H * Attempts: 2 of 3 used Submit Answer 8 81°F Partly sunny 0 K 2:41 6/2/A 275-lb block rests on a horizontal floor. The coefficients of friction between the block and the floor are 0.53 for static and 0.36 for kinetic respectively. Determine the force (P) that is required to a) Just break the block loose and get it movingb) Maintain the block moving at a constant speedSuppose a car accelerates from 69 to 112 km/h? By what percent does the drag force on a car increase?
- Andrea pulls a 25 kg box horizontally from rest while exerting a constant horizontal force, displacing the box 3.0 m in 10 s. Neglecting friction, the force Andrea exerts on the box is approximately.Body A weighs 109 N, and body B weighs 30 N. The coefficients of friction between A and the incline are μ = 0.56 and μk = 0.25. Angle is 40°. Let the positive direction of an x axis be up the incline. Frictionless, massless pulley A B (a) Find the acceleration of A if A is initially at rest. m/s²) î (b) Find the acceleration of A if A is moving up the incline. m/s²) î (c) Find the acceleration of A if A is moving down the incline. ( m/s²) î7)A desk with a mass of 75.0 kg sits on a floor, and the coefficient of static friction between the two surfaces is 0.40. Draw a force diagram for the problem and how much force must someone apply in a direction horizontal to the surface of the floor to get the desk moving?