The platform is rotating about the vertical axis such that at any instant its angular position is 0 = (4t³/2) rad, where t is in seconds. A ball rolls outward along the radial groove so that its position is r = (0.1t³) m, where t is in seconds. (Figure 1) Figure 1 of 1 Part A Determine the magnitude of the velocity of the ball when t = 1.4 s. Express your answer to three significant figures and include the appropriate units. V = Submit Part B Value a = μA Submit Request Answer Determine the magnitude of the acceleration of the ball when t = 1.4 s. Express your answer to three significant figures and include the appropriate units. μA Value Request Answer Units < Return to Assignment Units ? Provide Feedback ?

Q2/ The ball is thrown off the top of the building. If it strikes the ground at B in 3 s, determine the initial velocity VA and the inclination angle 04 at which it was thrown. Also, find the magnitude of the ball's velocity when it strikes the ground. 75m IB 60 m

Collars A andB slide along the fixed right-angle rods and are connected by a cord of length L = 6.9 m. Determine the acceleration of collar B when y = 2.3 m if collar A is given a constant upward velocity vĄ = 1.61 m/s. The acceleration of B is positive if to the right, negative if to the left. Answer: aB = i m/s2

The slider P can be moved inward by means of the string S, while the slotted arm rotates about point O. The angular position of the arm is given by 0 = 0.53t -0.036t2, where is in radians and t is in seconds. The slider is at r = 1.29 m when t = 0 and thereafter is drawn inward at the constant rate of 0.12 m/s. Determine the velocity v and acceleration a of the slider when t = 3.1 s. Express your answers in the x-y coordinate system. Answers: At t = 3.1 s, V = ( i i+ i j) m/s a = ( i i+ i j) m/s²