45 kg.** X = ? +0.4 m -0.5 m 30 kg 40 kg The 3m long uniform plank is supported by a fulcrum at the midpoint. Where should a 45kg student must be from the midpoint to be able to balance the plank?

A uniform 10.0 m ladder of weight WL=375 N leans against a frictionless wall. There is a force of static friction between the floor and the bottom of the ladder. A person weighing Wp stands 7.4 m between the bottom of the ladder.  Draw a free body diagram for the ladder. Draw a torque diagram for the ladder.  Determine the force that the wall exerts on the top of the ladder. Determine the force of static friction exerted on the ladder by the floor.

B4

The figure shows a 4.20-kg, 1.80-m-long rod hinged to a vertical wall and supported by a thin wire. The wire and rod each make angles of 45° with the vertical. When a 10.0-kg block is suspended from the midpoint of the rod, the tension T in the supporting wire is 49.3 N. The wire will break when the tension exceeds 75.0 N. 45° 45° T 10kg Tipler & Mosca, Physics for Scientists and Engineers, 6e © 2008 W.H. Freeman and Company What is the maximum distance dmax from the hinge from which the block can be suspended? dmax = m

A horizontal 8 kg plank is 3.0 m in length and has its center of mass at the geometrical center. A 2 kg mass is placed 1.0 m from one end and the plank is supported from the ends. Calculate the forces of support. 1.0 m 2 kg 3.0 m

Bob and Anna sit on opposite ends of a uniform see-saw which is 12.0 m in length. The see-saw is balanced by a fulcrum which is located 4.00 m from Bob. Bob has a mass of 85.0 kg, and the see-saw itself has a mass of 100 kg. Anna’s mass is unknown. NOTE THAT THE FULCRUM IS NOT PLACED AT THE CENTER OF MASS OF THE SEE- SAW!!! a)   What is the net torque on the see-saw? Explain clearly and briefly how you know. b) Draw a properly labeled extended force diagram of the see-saw   c) Solve for Anna’s mass. Show your work clearly!

Don't Use Chat GPT Will Upvote And Give Handwritten Solution Please

Three children are trying to balance on a seesaw.  The seesaw is 4.1 m long and pivots about a rock at its center.  Louie and Laura are already sitting on opposite ends.  If Martha weighs 33 kg, where should she sit so as to balance the seesaw?

13. Freddy who weights 20kg, sits on one side of the seesaw which is 3.5m away from the center. His father sits on the other side and balances the seesaw. If his Father weights 70kg, how far away from the center is he sitting? 14. A Steel wire 3 ft long and a copper wire 2 ft long each 0.20in? in cross section, are fastened together end to end and are then subjected to a Tension of 200lbs. Calculate the elongation of each wire if the young's modulus of steel is 29x10 and 19x10 for copper.. 15. What is the absolute pressure at the bottom of a 10m water tank?