Worksheet - Center of Gravity Name: 1. Where is the CG of a donut? 2. Can an object have more than one CG? 3. Indicate which of the above tractors will topple over in the situations shown to the right. 4. You stand with your back and legs against a wall. You lean forward to touch your toes. What happens and why? 5. The CGs of three trucks parked on a hill are shown by the Xs in the figure. Which truck(s) will topple over? 6. You stand with your face and toes against a wall. You raise yourself up on to your toes. What happens and why? 7. Three uniform wood blocks are placed on a ramp as shown. A) Indicate the center of mass for each block. B) Indicate which of the three is least likely to fall over. Explain your reason for choosing this block. 8. To resist being toppled why does a wrestler stand with (a) feet wide apart and (b) knees bent? 9. Why does a pregnant woman during the late stages of pregnancy or a man with a large paunch tend to lean backward when walking? Worksheet - Center of Gravity Name: 10. Three uniform wood blocks are placed on a ramp as shown. A) Indicate the center of mass for each block. B) Indicate which of the three will most likely fall over. Explain your reason for choosing this block. 11. A book can be rested on a table in two different positions resting on its back cover or resting on its bottom edge. Which is more stable and why? 12. A basketball is being pushed by two players during tip-off as shown a. Are these two torques in the same direction or opposite? b. Find the net torque acting on the ball. 13. At what engine speed do you get the most torque? The most power? At what torque do you get the greatest power? 14. A board supports two children, one weighing 510 N and the other weighing 350 N. The support is under the center of the board and the 510 N child is 1.50 m from the center. Where should the 350 N child sit to balance the system?