The two blocks shown are originally at rest. Block A has a weight of 100 lb and block B has a weight of 250 lb. Neglecting the masses of the pulleys and the effect of friction in the pulleys and between block A and the incline.
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- RAIL LINES CROSS COUNTRY MOVERS OO 00 theta A 13,129-lb truck enters an emergency exit ramp at a speed of 112.4 ft/s. It travels for 7.9 s before its speed is reduced to 24.5 ft/s. Determine the braking force by the truck if the acceleration is constant. (Use Impulse-Momentum concepts.) Assume theta = 21.4 degrees Calculate your answer to two decimal places. Report your answer in pounds of force (lbf).Use 3 decimal places The 250-N block rests upon a level plane for which fk = 0.2. It is pulled by force P = 100N inclined at 20o with the horizontal. 1. Find the velocity of the block after it moves 20m starting from rest. 2. If the 100-N pull is then removed, find the distance the block will travel.Bodies A and B shown in the figure are connected to each other by two ropes. Body b is located on the frictionless surface. Acismi moves down from the stop position at T=0 with a constant acceleration of 100 mm/sec2. t = 2 sec how many mm do Bodies A and B move, respectively? в A Please select one: a.200 mm down, 50 mm right b.200 mm down, 200 mm right c.200 mm down, 800 mm right d. None of them e.200 mm down, 400 mm right
- Q1. In a link work, as shown in Fig. below, the crank A B rotates about A at a uniform speed of 150 r.p.m. The lever DC oscillates about the fixed point D, being connected to A B by the connecting link BC. The block F moves, in horizontal guides being driven by the link EF, when the crank A B is at 30°. The dimensions of the various links are: AB = 150 mm; BC = 450 mm; CE = 300 mm; DE = 150 mm; and EF = 350 mm. Find, for the given configuration, find 1- angular acceleration of link DC, and 2- acceleration of slider F. 75 mm www 450 mm 37,5 mm AQ2: The speed of a car increases uniformly with time from (70 km/h) at A to (120 km/h) at B during (15 sec). The radius of curvature of the hump at A is 40 m. If the magnitude of the 0.6 m total acceleration of the mass center of the car is the same at B as at A, PH compute the radius of curvature pe of the dip in the road at B. The mass 40 mm center of the car is 0.6 m from the B road.Find the distance covered by object A in 10 seconds . Its initial velocity V1 = 15 m/s and its acceleration 2 m/s2 : You can use the formulae V2 - V1 = at V22 - V,² = 2 a s S = V, t + 0.5 a t2 :Choose the correct answer :Select one a. 250 m b. 30 m c. 1800 m d. 450 m
- b) If P=10, determine the acceleration of B and the tension in the chord?5 Timmy pulls with a force of 35 N on the massless rope which belongs to the pulley arrangement shown. Pulley wheels A, B, and C are fixed to the wall and don't move. The pulley system is frictionless. The cart's rolling friction is not negligible. Timmy's feet do not slide on the cart surface. A) What is Timmy's acceleration? B) Calculate the friction force on Timmy's shoes. What type of friction is this? А M7 = 28 kg mc = 15 kg Hy = 0.02 B mc7. You are riding your mountain bike down a hill that is inclined at an angle of 0 degrees above the horizontal. You notice a section of loose gravel on the trail so you slam on your brakes to stop. The gravel is such that its coefficient of kinetic friction is variable, and can be written as µ(x) = Hge*/a In the above expression, x is the distance the bike has traveled, d is the total distance the bike travels while stopping, and Ho is the initial coefficient of friction. You and the bike have a combined mass of m1. Using this information, find the total amount of thermal energy generated as you stop.
- 4. 2) The hydraulic cylinder D extends, moves the rigid rod ABC, and causes the collar A to move with velocity and acceleration both to the left. If the dimensions 4 1.0 ft, and 2 = 1.7 ft, VA = 4.9 ft/s, aa = 2.6 ft/s2, and the angle 0 = 27°, determine the speed of point B. Please pay attention: the numbers may change since they are randomized. Your answer must include 2 places after the decimal point, and proper unit. В 12 D a Your Answer: Answer units 1,In a rope-climbing competition, all of the lifting is done by the arms; legs can only dangle. Imagine 220-lb Garvin Smith in training, hanging stationary from the rope, his legs off the floor. When prompted by his coach, he rapidly lifts his center of mass by 4 ft. in 0.65 s. Calculate Garvin Smith's acceleration. Round the final answer to one decimal place. Determine the net force (“force imbalance”) producing the acceleration. Round the final answer to one decimal place. Which forces are acting on Smith? (Note that his arms are part of himself, so they cannot exert a force on Smith.) With what magnitude force is Smith pulling down on the rope? Round the final answer to one decimal place. The force of 130.2 lb points _____.Plot the earths gravitational acceleration g(m/s2) against the height h (km) above the surface of the earth.