A rider of mass 78.0-kg sits 1.70 meters left of the pivot point. A different rider sits 3.5 meters to the right of the pivot point. If the see-saw is in equilibrium, what is the rider on the right's mass? The mass of the see-saw is 19.2-kg Give your answer in kilograms to the correct number of significant figures.

3. Three kids stand on a see-saw as shown. The see-saw has a uniform cross section and weighs 15 lb, while kids A, B, and C weigh 35 lb, 45 lb, and 25 lb, respectively. Determine the weight of the rock at point E required for the system to maintain a perfect balance, and the reaction at support D. Write your answers using 3 significant digits. B A C 1 ft 1 ft 7.5 ft 0.5 ft E

stion 3 of 8 A 25.5 kg mass (m) is suspended by the cable assembly as shown in the figure. The cables have no mass of their own. The cable to the left (T) of the mass makes an angle of 0.00° with the horizontal, and the cable to the right (T,) makes an angle (02) of 36.4°. If the mass is at rest, what is the tension in each of the cables, T and T,? The T, 1. 7, acceleration due to gravity is g = 9.81 m/s´. | Ti T2 %23 2.

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Fill in the data as you complete the lab. In the table, m represents mass and r represents the distance from the fulcrum. Use a zero or a dash (–) when there is no second object on one side of a problem. Include units with all data. The image of the balancing act is scenrio 2.

Sam and Joe carry a beam, walking to the right.  Calculate the force that Sam exerts, in pounds. The beam's weight is 163 lb. The beam's length is 22 ft. Sam is 5 ft from the back. Joe is 5 ft from the front.

In the figure below a crowbar is used to lift a weight. If a down ward force of 246 N is applied to the end of the bar, how much weight does the other end bear? The crowbar itself has negligible weight. (Let r1 = 30.5 cm and r2 = 4.70 cm.) please sovle thank you

3. Bob and Tom are on opposite sides of a 12 foot see-saw (teeter totter). Bob weight’s 96.6 pounds.The see-saw weight 75 pounds. Bob is sitting 1.5 feet from the left end of the see-saw. Tom is sitting 2 feet from the right end of the see-saw. The pivot for the see-saw is 6 feet from the left end. The see-saw is in balance horizontally. What is Tom’s weight?

11. The sketch shows a painter's scaffold in mechanical equilibrium. The person in the middle weights 250 N, and the tensions in each rope are 200 N. What is the weight of the scaffold? 200 N Ad 250 N *W=? א 200 12. A cue striker a billiard ball, exerting an average force of 23 Newtons over a time of 14 milliseconds. If the ball has mass 0.36-kg, what speed it have after impact ?

Clamp Stand Figure 1 4 Leave the knife-edge of the first clamp at the center of mass of the stick and on the fulcrum. Place the second clamp with a hanging mass of 100 g at the 5.0 cm mark (Figure 2). Find the location of the third clamp on the stick with a hanging mass of 150 g that will balance the stick. =390m П. 10 20 30 40 50 Figure 2 69 100 g 150 g