A 2000-kg automobile starts from rest at point A on a 6° incline and coasts through a distance of 150 m to point B. The brakes are then applied, causing the automobile to come to a stop at point C, 20 m from B. 20 m
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- The lower block of mass m2 = 3.2 kg is pulled on by a rope with a tension force of 28 N. The upper block has mass m1 = 1.8 kg. The coefficient of kinetic friction between the lower block and the surface is 0.32. The coefficient of kinetic friction between the lower block and the upper block is also 0.32. What is the acceleration of the 3.2 kg block?A motorcyclist in a circus rides his motorcycle within the confines of the hollow sphere. The coefficient of static friction between the wheels of the motorcycle and the sphere is μ = 0.5. The mass of the motorcycle and rider is 250 kg, and the radius of curvature to the center of gravity is ρ = 20 m. Neglect the size of the motorcycle for the calculation. (a) Determine the minimum speed at which he must travel if he is to ride along the wall when θ = 90∘. Express your answer to three significant figures and include the appropriate units.The 18 000-kg F-35B uses thrust vectoring to allow it to take off vertically. In one maneuver, the pilot reaches the top of her static hover at 200 m. The combined thrust and lift force on the airplane applied at the end of the static hover can be expressed as F = (44t + 2500t2)i + (250t2 + t + 176 580)j, where F and t are expressed in newtons and seconds, respectively. Determine how long it will take the airplane to reach a cruising speed of 1000 km/hr (cruising speed is defined to be in the x-direction only).
- The 554-kg block E is supported by two light parallel links, where = 0.37 m. At what angle (in degrees) should block E be released from rest in order to strike the object F with a speed of v = 1.68 m/s? Object F is struck when = 31.9. Friction is negligible. Choose the correct answer. 73.2 56.5 63.2 66.5 76.5A 0.45 kg collar, of negligible size, is attached to a spring having an unstretched length of 190 mm. If the collar is released from rest at A and travels along the smooth guide, what is its speed just before it strikes the stop at B? 200 mm EM - B k = 150 N/m A 400 mmQ.1) A 50 kg block is dropped from a height of 2 m onto the the 20 kg pan of a spring scale.Assuming the impact to be perfectly plastic, determine the maximum deflection of the pan.The constant of the spring is k = 20 kN/m.Q.2) Answer the following questions:a) Why does any person lean towards right while carrying a bag in her left hand?b) Give the physical significance of moment of inertia.c) Two satellites of equal masses, which can be considered as particles areorbiting the earth at different heights? Will their moments of inertia be same ordifferent?Q.3) A 5-kg model rocket is launched vertically and reaches an altitude of 100 m with a speedof 40 m/s at the end of powered flight, time t=5 s. As the rocket approaches its maximumaltitude it explodes into two parts of masses mA=1.7 kg and mB=3.3 kg. Part A is observed tostrike the ground 50 m west of the launch point at t=6 s. Determine the position of part B atthat time.
- The W1= 69.01-lb block shown rests on a smooth plane (coefficient of kinetic friction = 0) with an angle of θ=34∘ from horizontal. It is connected by a flexible inextensible cord that passes around weightless, frictionless pulleys to a support. The W2 =134.93-lb weight is attached as shown. After the system is released from rest, in what distance will the block on the plain attain a speed of 10.0 ft/s?A SMALL 0.65 BOX IS LAUNCHED FROM REST BY A HORIZONTAL SPRING .THE BLOCK SLIDES ON A TRACKDOWN A HILLAND COMES TO REST AT A DISTANCE d FROM THE BASE OF THE HILL .KINEIC FRICTION BETWEEN THE BOX AND THE TRACK IS NEGLIGIBLE ON THE HILL,BUT THE COEFFICIENT OF KINETIC FRICTION BETWEEN THE BOX AND THE HORIZONTAL PARTS OF TRACK IS 0.35.THE SPRING HAS A SPRING 34.5N AND IS COMPRESSED 30cm WITH THE BOX ATTACHED.THE BOX REMAINS ON THE TRACK AT ALL TIMES. (a)xcalculate the speed of the box before it starts descending down the hill(The complete question is in the picture) Consider a 2.0 [kg] box that is attached to two identical springs that are in their relaxed state when the block is centered on the frictionless horizontal floor. The box is pressed to the left and then was released from rest as shown in the figure. If work done by the left spring is Wby spring = 25 [J], what is the speed of the boxas it passes the center x = 0? A. 8.2 [m/s]B. 7.1 [m/s]C. 3.5 [m/s]D. zero
- Starting from rest, it takes 1 second for m1 to fall 1.5m. A ring of unknown mass sits on top of m1 as it falls. If m1=2kg and m2=2.5kg, and the incline is frictionless, what force does m1 put on the ring?Block A in Fig. has mass 4.00 kg, and block B hasmass 12.0 kg. The coefficient of kinetic friction between block Band the horizontal surface is 0.25. (a) What is the mass of block C ifblock B is moving to the right and speeding up with an accelerationof 2.00 m/s2? (b) What is the tension in each cord when block B hasthis acceleration?consider the mass and pulley system in the attached file. mass m1 = 29 kg and mass m2 = 12kg. the angle of the inclined plane is given and the coefficient of kinetic friction between mass m2 and the inclined plane is uk = 0.12. assume the pulleys are massless and frictionless if the system is released from rest, what is the speed of mass m2 after 2.5 s? v(2.5 s) = ?