Energy and Momentum Problem HELP

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SUMMARY

Brutus, a weightlifter, raises a mass of 260 kg to a height of 2.50 m. The work done while holding the weights is calculated using the formula W = FdCos, where F is the force due to gravity (F = mg) and d is the distance. The power developed during the lift, completed in 2.4 seconds, is determined using the formula P = W/t. The calculations yield specific values for work and power based on these equations.

PREREQUISITES
  • Understanding of Newton's second law (force calculation)
  • Familiarity with the work-energy principle
  • Knowledge of power calculation in physics
  • Basic proficiency in unit conversions (Joules, seconds)
NEXT STEPS
  • Calculate the force exerted by Brutus using F = mg
  • Determine the work done while holding the weights using W = Fd
  • Compute the work done while lowering the weights
  • Explore the relationship between work and power in physics
USEFUL FOR

Students studying physics, particularly those focusing on mechanics, weightlifting coaches analyzing performance, and anyone interested in the practical applications of work and power calculations.

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Energy and Momentum Problem...HELP!

Homework Statement



Brutus, a champion weightlifter, raises 260 kg of weights a distance of 2.50 m.
(b) How much work is done by Brutus holding the weights above his head in Joules?
(c) How much work is done by Brutus lowering them back to the ground in Joules?
(e) If Brutus completes the lift in 2.4 s, how much power is developed?


Homework Equations


W=FdCos
P=W/t


The Attempt at a Solution

 
Physics news on Phys.org


you know the mass. and the distance that the mass is lifted.
so calculate the force of the mass
then calculate the work done
 

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