Energy question, involving work, there is a missing variable?

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SUMMARY

The discussion centers on calculating the constant speed of a forklift lifting a 613.0 kg mass with a power output of 950 W. The key equations involved are W = F * change in displacement and P = W/t. By manipulating these equations, participants concluded that the speed can be derived using the formula P = mg * v, where P is power, m is mass, and g is the acceleration due to gravity. The final calculation yields a speed of approximately 1.54 m/s for the forklift.

PREREQUISITES
  • Understanding of basic physics concepts such as work, power, and force.
  • Familiarity with the equations W = F * d and P = W/t.
  • Knowledge of gravitational force calculations (mg).
  • Ability to manipulate algebraic equations to solve for unknowns.
NEXT STEPS
  • Study the relationship between power, force, and velocity in mechanical systems.
  • Learn about the implications of lifting loads with constant speed in physics.
  • Explore real-world applications of power calculations in engineering and machinery.
  • Investigate the effects of varying mass and power on the speed of lifting devices.
USEFUL FOR

This discussion is beneficial for physics students, mechanical engineers, and anyone involved in the design or operation of lifting equipment, particularly those interested in the dynamics of power and motion.

oddcitations
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Homework Statement



A 613.0 kg mass is placed on a forklift that can generate 950 W of power. What is the constant speed of the forlift while lifting this load?

Homework Equations



W = F * change in Displacement ( or (F)(change in displacement)(costheta))

W = mg * Change in displacement

P = W/t
Ekinetic = 1/2mv^2

Work is in joules, power is in Watts.

The Attempt at a Solution



950 W = W/t (I don't have time or displacement)

W = mg * change in displacement
W = (9.5*613 )* change in displacement(which I do not have)
W = 6007.4 N *change in displacement
change in displacement = vAverage * change in time
change in time = all include velocity, which I am looking for.
?

Ekinetic = 1/2mv^2
xJ = (613.0kg/2)v^2
xJ = 306.5v^2
?


I feel like I need displacement or time, but I'm given neither. :\
 
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oddcitations said:
W = F * change in Displacement

Good! Now what happens if you take both sides of this equation, and divide them by t?
 
oddcitations said:

Homework Statement



A 613.0 kg mass is placed on a forklift that can generate 950 W of power. What is the constant speed of the forlift while lifting this load?

Homework Equations



W = F * change in Displacement ( or (F)(change in displacement)(costheta))

W = mg * Change in displacement

P = W/t
Ekinetic = 1/2mv^2

Work is in joules, power is in Watts.

The Attempt at a Solution



950 W = W/t (I don't have time or displacement)

W = mg * change in displacement
W = (9.5*613 )* change in displacement(which I do not have)
W = 6007.4 N *change in displacement
change in displacement = vAverage * change in time
change in time = all include velocity, which I am looking for.
?

Ekinetic = 1/2mv^2
xJ = (613.0kg/2)v^2
xJ = 306.5v^2
?


I feel like I need displacement or time, but I'm given neither. :\

take equation w=mg*d
divide both side by t,then u will get p=mg*v
put the values of p,m&g,so find the velocity of forlift...
 
cepheid said:
Good! Now what happens if you take both sides of this equation, and divide them by t?

Ah...
nikhil khatri said:
take equation w=mg*d
divide both side by t,then u will get p=mg*v
put the values of p,m&g,so find the velocity of forlift...


That is so ingenius, I love it! Thank you guys very much! :]
 

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