The 64.4-lb slider moves in the vertical plane on a smooth rail. The spring with k = 800 lb/ft is unstretched with the slider at point B. If the slider is released from rest at point A, what is the speed at point C? The slider can be approximated as a particle. 8/ 3 ft C ww-- A B 3 ft
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- The coefficient of rolling resistance between the 30-kg lawn roller and the ground is r=0.1. (a) Determine the force P required to pull the roller at a constant speed. (b) What force P would be needed to push the roller at a constant speed?The torsional spring has a stiffness of 20 N-m/rad and is undeflected when the 3-kg uniform slender bar is in an upright position. If the bar is released from rest in the horizontal position shown, find its angular velocity as it passes the vertical position. Neglect friction effects. 4 Type here to search ThinkVision K - Pan Tab Cape Look Esc Q A Z G FT W S # ONDA 3 F2 E D A $ 4 R F 5 F4 T G XCVB 8 a Y H N P6 F6 U J M F7 K ( F8 F10 F11 +Backspace Enter T F12 Shift Print Screen SysRq Insert 0.5 m Scroll Lock Delete Home Break End Page Up Page Down Naam Lock K 37°F Cloudy Home Lenovo B 20A cart has a mass of 1.5 kg. It is given some initial push toward a sensor and is slowed by a hanging mass which makes the cart turn around and speed up as it returns to its original position. This situation is illustrated in the attached image. If the acceleration towards the sensor is 0.5 m/s2 and the accaleration away from the sensor is 0.15 m/s2, a. draw the free body diagrams for the cart moving towards the sensor and away from the sensor. b. Write Newton's law for both situations and solve for the frictional force and for the force from the hanging mass.
- At the instant -55, the boy's center of mass Gis momentarily at rest. (Elgure 1) Part A Determine his speed when 8-90. The boy has a weight of 65 lb Neglect his size and the mass of the seat and cords. Express your answer to three significant figures and include the appropriate units. Value Units Submit Request Answer Part B Figure 1 of 1> Determine the tension in each of the two supporting cords of the swing when e00 Express your answer to three significant figures and include the appropriate units. Value Units Submit Request Answer0.8m 0.8m, 1.0m /0.&m 0.6m Title The spring has an unstretched length of 0.4m and a stiffness of 200N/m. The 3 kg slider and attached spring are released from rest at A and move in the vertical plane. (a) Compute the change in elastic potential energy from A to B. (b) Compute the change in gravitational potential energy from A to B. (c) Compute the velocity of the slider as it reaches B in the absence of friction.The 1600 kg car has a velocity of v the driver sees an obstacle 175 m away, in front of the car. It takes 0.8 s for him to react and lock the brake 100 km/h when causing the car to skid. The coefficient of kinetic friction between the tires and the road is p = 0.25. Find the best correct statement(s) from the following for this situation: ,= 100 km/h Select one or more: Work done by the frictionis equal to 617.4 KW The working forces are ficion and the wejght. The car will stop just in front of the pbstacle without hittungui The car will hit the obstadle. The car skid for the distance of 157.34m,
- Cart 1 Mass - M Cart 2 Mass = 3.5M Force Sensor The spring cart (cart 1) is released and collided inelastically with cart 2 and the two carts move off together. The spring does not add any mass to cart 1. Assume negligible friction in the cart wheels.The free body diagram below shows the forces acting on the bob when it spins at a rate such that it hangs vertically as shown. F⃗ s, F⃗ e and W⃗ are the force due to the string, the force due to the elastic band, and the weight of the bob respectively. Mark all the correct statements below. Select one or more: a. F⃗ e is the centripetal force b. F⃗ s+W⃗ =0 c. F⃗ e+W⃗ is the centripetal force d. F⃗ s+F⃗ e is the centripetal forceC14-2. As the large ring rotates, the operator can apply a breaking mechanism that binds the cars to the ring, which then allows the cars to rotate with the ring. Assuming the passengers are not belted into the cars, determine the smallest speed of the ring (cars) so that no passenger will fall out. When should the operator release the brake so that the cars can achieve their greatest speed as they slide freely on the ring? Estimate the greatest normal force of the seat on a passenger when this speed is reached. Use numerical values to explain your answer.
- 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) = ?-0.9 m- -1 m- 0.4 m Q4: The uniform 4 m boom has a mass of 60 kg and is pivoted to the back of a truck at A and secured by a cable at C. Calculate the magnitude of the total force supported by the connection at A if the truck starts from rest with an acceleration of 5 m/s². Ans.: F1192 N B 4 m 60° -2 mThe 10-lb sultcase slides down the curved ramp for which the coefficient of kinetic friction is 4 = 0.2. At the instant it reaches point A it has a speed of 5 ft/s. Suppose that [= 5 ft. (Figure 1) Figure 1 of 1 Determine the normal force on the suitcase. Express your answer to three significant figures and include the appropriate units. N = Value Submit Part B Request Answer = Value Submit Determine the rate of increase of its speed. Express your answer to three significant figures and include the appropriate units. Units Request Answer Units ? < Return to Assignment Provide Feedback ?