Assignment:
Question
(1) The spring is placed between the wall and the 40 lb block. If the block is subjected to a 250 lbs force as shown, determine its velocity when s = 6 inches. When 5 = 0, the block is at rest and the spring is uncompressed. The coefficient of friction between the block and the ground is μk = .1
(2) When a ball is released from rest at a height of 5 ft above the floor, it bounces to a height of 3.5 feet. If that same ball is thrown at the floor with a velocity of 30 ft/ s and is released at 3.5 feet above the floor, how high will it bounce? The ball weighs 1.25 lbs.
(3) Bar AB rotates with a counterclockwise angular velocity of 10 rad/s. At the instant shown, what are the angular velocities of bars BC and CD?
(4) (a) Determine the velocity of the slider block when t =2 seconds, if the rotation of the wheel is governed by the equation shown.
(b) Find the angular velocity of link BC at this moment.
(c) Find the angular acceleration of link BC and the acceleration of block c.
