A sturdy 2.44m board is to be used to raise one corner of an automobile to remove a tire. If that corner of the car weighs about 2000N and the pivot under the board can be no closer than 20.0cm from the end of the board supporting the car, calculate the mass required at the other end of the board to hold the tire off the ground. Assume the board will be in a horizontal position?
A solid disk with m=60.0kg and a diameter of 48.0cm is to be turned from rest through 12.0 revolutions in 6.00s. Calculate the torque required to accomplish this?
Mass m1=10.0kg is located at the origin of a coordinate system. Mass m2=20.0kg is 1.20m to the right along the x axis. Mass m3=25.0kg is 90.0cm above the origin along the y axis. Find the coordinates of the center of mass of this system?