Physics

Physics, 14.07.2019 20:20, tstaples02

If x=450 mm, determine the mass of the counterweight s required to balance a 90-kg load, l.

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Physics, 03.10.2019 01:00, smithad382

When a trebuchet counterweight is hoisted by soldiers, what form of energy is transferred into the machine as work? 2. what is the relationship between the mass of the counterweight and the amount of work done on the projectile? 3. describe how lifting a counterweight is doing work using the formulaw = fd. 4. what force must be overcome to lift the counterweight? 5. if the mass of the counterweight increases by adding more mass, how does the force required to lift the counterweight change? 6. how is the work done to hoist the counterweight related to the potential energy of the counterweight at its specified height? 7. if energy is conserved, describe the kinetic energy of the projectile in relation to the work in and the potential energy of the counterweight. 8. provide a well-written hypothesis that can explore the function of the counterweight in a trebuchet. 9. identify the dependent and independent variables in your experiment. 10.where is a safe place to use your trebuchet? 11.how will you determine the work done to the counterweight to hoist it to the catapulting lever? 12.how will you measure the distance the projectile flies? 13.how will you use the dependent variable and independent variable in your data table? 14.what factors need to be kept consistent during the experiment? 15.why is it important to do multiple trials for each different counterweight and then calculate the average?

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Physics, 16.10.2019 16:20, igobeastmode

Consider a vertical elevator whose cabin has a total mass of 800 kg when fully loaded and 150 kg when empty. the weight of the elevator cabin is partially balanced by a 400-kg counterweight that is connected to the top of the cabin by cables that pass through a pulley located on top of the elevator well. neglecting the weight of the cables and assuming the guide rails and the pulleys to be frictionless, determine (a) the power required while the fully loaded cabin is rising at a constant speed of 1.2 m/s and (b) the power required while the empty cabin is descending at a constant speed of 1.2 m/s. what would your answer be to (a) if no counterweight were used? what would your answer be to (b) if a friction force of 800 n has developed between the cabin and the guide rails?

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Physics, 17.10.2019 06:00, Giabear23

In a stage production of peter pan, the 63 kg actress playing peter has to fly in vertically, and to be in time with the music, she must be lowered, starting from rest, a distance of 2.6 m in 2.2 s. backstage, a smooth surface sloped at 58◦ supports a counterweight of mass m. what is the mass of the counterweight that must be used? the pulley is of negligible mass and is frictionless. the acceleration of gravity is 9.81 m/s^2. answer in units of kg.

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If x=450 mm, determine the mass of the counterweight s required to balance a 90-kg load, l....

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