4. [-12 Points] DETAILS OSCOLPHYSZO16 9.5.P.024. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Suppose you use an ideal pulley of the type shown in image (a) in the gure below to support a car engine of mass 120 kg. (a) [b] (a) What would be the tension in newtons in the rope? :IN (b) What force in newtons must the ceiling supply, assuming you pull straight down on the rope? Neglect the pulley system's mass. |:|N Additional Maten'als 5. [-H Points] DETAILS OSCOLPHY52016 9.6.P.031. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER We analyzed the biceps muscle example with the angle between forearm and upper arm set at 90D (see gure below}. Triceps Find the force exerted by the biceps muscle when the angle is 115 and the forearm is in a downward position. [Assume that r1 = 3.0 cm, r2 ma = 3.0 kg, and mb = 4.2 kg. Enter the magnitude.) |:|N 'l' = 14 cm,r 3 = 36 cm