34.A student lies on a weightless board atop two scales as shown in the figure.What is the student’s weight?
35.A father (mass 2ᵅ
) and his son (mass ᵅ
) begin walking towards opposite endsof a balanced see-saw. As they walk, the see-saw stays exactly horizontal. How dotheir speeds compare?
36.Due to Mr. Hart’s teacher salary, he is required to obtain a job over thesummer pushing children on a merry-go round. In order to make the job easier, Mr.Hart shouldAPlace all the children on the outer edge of the circle, spread out evenlyBPlace all the children on the outer edge, concentrated on one sideCPlace all the children in a line going through the diameter of the circle.DPlace the children in the center of the circle.
37.The pulley system consists of two solid disks of different radii fastenedtogether coaxially, with two different masses connected to the pulleys as shown.Under what condition will this pulley system be in static equilibrium?Arm=RMBr2m=R2MCrM=RmDr2M=R2m38.A dumbbell consists of two masses m connected by a rigid rod of negligiblemass and length d. A physics student takes the dumbbell and rotated it aboutits center of mass with an angular velocity ω, giving it an angular momentumL1. The student then takes a second dumbbell, with masses 2m and length 2d,and rotates them with the same angular velocity ω. What is the angularmomentum L2 of this second dumbbell?A2L1B4L1C6L1D8L1Page 8 of 9