Q4:A smooth 5 kg collar shown in fig 1, fits loosely on the vertical shaft. if the spring is unstrched when the collar is in the position A, determine the speed at which the collar is moving when y31m,if (a) it is released from rest at A and (b)it is released at A with an upwared velocity Va-6m/s. 0.75 m wwww k-3 N/m my (a) Figure 1.

Q1 [Type B]: The 20-lb crate A rests on a smooth surface. If the crate starts from rest and P = (t² + 1.5t) lb where t is in seconds, determine the speed of the crate A at t = 2 s using the method of linear impulse and momentum. Not using the required method would result in a 0 for this question. A Shaobo Huang P 30⁰

F2 Problem 2. EOM Derivation Derive the equation of motion for the following system: F3 F4 Dry Friction= Fµ m Q Search DII % y(t) F5 ☀ F6 A F7 7 PrtScn F8 * M Home F9 B E

Dynamics

Rod OA rotates counterclockwise with an angular position - 2t rad, where t is in seconds. The double collar B is pin-connected together such that one collar slides over the rotating rod and the other collar slides over the circular hoop rod described by the equation r = 1.6cose m. If the total mass of both collars is 0.5 kg and of the rod and hoop are negligible, when = 30° which takes t = ()(180) sec, determine the circumferential acceleration of the collars, ag. [m/s2] (sign sensitive) 6=ki 16 cos 8.

A slender bar with a length of 2 ft is pin-connected with a roller positioned on a smooth horizontal surface. The bar is at rest initially, and a horizontal force F is applied to the roller. If F = 13 lb and the weight of the bar is 10 lb, calculate the magnitude of the acceleration of the roller at that instant by neglecting the mass and the size d of the roller. Present your answer in ft/sec² using 3 significant figures. FOR COMARCA 2 ft F

Please help in 3, 4, and 5

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 20

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The 150-g hockey puck initially rests on a surface at A with the spring compressed by 0.2 m, as shown. The kinetic friction coefficient between the surface and the puck is ?? = 0.1. The puck is in contact with the spring but is not attached to it. Subsequently, the spring is released. Determine the minimum stiffness of the spring so that the puck just clears the wall at B. Use any method(s) that you like