The boy of mass 45 kg is sliding down the spiral slide at a constant speed such that his position, measured from the top of the chute, has components r = 1.5 m, 0 = (0.7t) rad, and z = (-0.5t) m, where t is in seconds. Neglect the size of the boy. (Figure 1) igure Part A Z VE| ΑΣΦ | 41 Z vec r = 1.5 m Determine the r, 0, z components of force F which the slide exerts on him at the instant t = 2 s using scalar notation. Express your answers using three significant figures separated by commas. B 1 of 1 ?

The 1.334-Mg car is traveling along the curved road described by r = (50e28) m, where 0 is in radians. If a camera is located at A and it rotates with an angular velocity of Ó = 0.083 rad/s and an angular acceleration of ö = 0.304 rad/s? at the instant 0 = 0.879 rad, .determine the resultant friction force developed between the tires and the road at this instant %3D r= (50")m

The 52 kg block is hoisted up the incline using the cable and motor arrangement shown. (Figure 1) Figure 2 m/s Part A The coefficient of kinetic friction between the block and the surface is = 0.4. If the block is initially moving up the plane at v0 = 2 m/s, and at this instant (t = 0) the motor develops a tension in the cord of T = (300+120√t) N, where t is in seconds, determine the velocity of the block when t = 4 s. Express your answer to three significant figures and include the appropriate units. v2 = Submit Value Provide Feedback A Request Answer → Ò Units ? Next >

The homogeneous cylinder A has a mass of 80 kg, and the mss of the hub can be neglected. The magnitude of the variable force P, is in newtons when t is in sec- onds. The velocity of body B changes from 2 m/s downward when t = 0 to 4 m/s downward t = 5 s. Determine the mass of B. Solve all questions using Impulse and Momentum methods

A force of F = 13 N is applied to the 10-kg ring as shown. Slipping does not occur. Neglect the thickness of the ring. (Figure 1) Part A Determine the ring's initial angular acceleration, measured clockwise. Express your answer using three significant figures. Enter positive value if the angular acceleration is clockwise and negative value if the angular acceleration is counterclockwise. να ΑΣφ vec rad/s? Submit Request Answer Figure < 1 of 1 Part B F Determine the magnitude of the acceleration of the ring's mass center, G. Express your answer to three significant figures and include the appropriate units. 45 µA 30 0.4 m aG = Value Units Submit Request Answer L. Part C