Answer Happy

2. (-/6 Points) DETAILS SERCP8 8.P.072. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Two astronauts, each having a mass of 88.0 kg, are connected by a 10.0 m rope of negligible mass, They are isolated in space, moving in circles around the point halfway between them at a speed of 5.20 m/s. Treating the astronauts as particles, calculate each of the following. Center of gravity (a) the magnitude of the angular momentum of the system kgm/s (b) the rotational energy of the system ku By pulling on the rope, the astronauts shorten the distance between them to 5.00 m. (c) What is the new angular momentum of the system? kg-m/s (a) What are their new speeds? m/s (e) What is the new rotational energy of the system? k] () How much work is done by the astronauts in shortening the rope? K)
3. [-/2 points) DETAILS SERCP8 8.P.074 MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Two window washers, Bob and Joe, are on a 3,00 m long, 360 N scaffold supported by two cables attached to its ends. Bob weighs 825 N and stands 1.00 m from the left end, as shown in the figure below. Two meters from the left end is the 500 N washing equipment. Joe is 0.500 m from the right end and weighs 900 N. Given that the scaffold is in rotational and translational equilibrium, what are the forces on each cable? left cable KN right cable KN 0.500 m 4. (-/1 Points] DETAILS SERCP8 8.P.080. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER a circus performance, a large kg hoop of radius 3.0m rolls without slipping. If the hoop is given an angular speed of rad/s while rolling on the horizontal and allowed to roll up a ramp inclined at 15° with the horizontal, how far (measured along the incline) does the hoop roll? m 5. [-/1 Points) MY NOTES DETAILS OSAPPHYSPREP2016 10.AP.018. ASK YOUR TEACHER PRACTICE ANOTHER Earth has a mass of 6.0 x 1024 kg, a radius of 6.4 x 106m, and an angular velocity of 1.2 x 10-5 rev/s. How would the planet's angular velocity change it a layer of Earth with mass 8.0 x 1023 kg broke off of the Earth, decreasing Earth's radius by 0.30 x 106 m? Assume no friction. (Give Earth's new angular velocity in rev/s. Assume the layer of Earth takes no angular momentum with it.) rev/s
Two astronauts, each having a mass of 88.0 kg, are connected by a 10.0 m rope of negligible mass. They are isolated in space, moving in circles around the point halfway between them at a speed of 5.20 m/s. Treating the astronauts as particles, calculate each of the following. In TI Center of gravity n (a) the magnitude of the angular momentum of the system kg-m/s (b) the rotational energy of the system k] By pulling on the rope, the astronauts shorten the distance between them to 5.00 m. (c) What is the new angular momentum of the system? kg.m2/s (d) What are their new speeds? m/s (e) What is the new rotational energy of the system? k] () How much work is done by the astronauts in shortening the rope? KJ