In San Francisco a very simple technique is used to turn around a cable car when

In San Francisco a very simple technique is used to turn around a cable car when it reaches the end of its route. The car rolls onto a turntable which can rotate about a verticle axis through its center. Then two people push perpendicularly on the car one at each end as shown in the drawing. The turntable is rotated one-half of a revolution to turn the car around. If the length of the car is9.20m and each person pushes with a 185N force what is the magnitude of the net torque applied to the car?A uniform plank of length 5.0m and weight 225N rests horizontally on two suports with 1.1m of the plank hanging over the right support. To what distance x can a person who weighs 450N walk on the overhanging part of the plank before it just begins to tip?