Calculating Final Speed of a 5kg Vase

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Homework Help Overview

The discussion revolves around calculating the final speed of a 5 kg vase that is lifted vertically with a constant upward force. The problem involves concepts from dynamics and kinematics.

Discussion Character

  • Mixed

Approaches and Questions Raised

  • Participants discuss the application of Newton's second law (F=ma) and the kinematic equation for final velocity. There is a focus on whether to include the gravitational force (mg) in the calculations, leading to questions about the net forces acting on the vase.

Discussion Status

Some participants are exploring the correct application of forces and questioning the necessity of including gravitational force in the calculations. There is no explicit consensus on the approach, but guidance is being sought regarding the steps to calculate the final speed.

Contextual Notes

Participants are considering the implications of multiple forces acting on the vase, specifically the applied force and gravitational force, which may affect the overall analysis of the problem.

bboycs
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final speed ??

A 5 kg vase is lifted vertically from rest to a distance of 10 m with a constant upward applied force of 60.0 N. Calculate

iii) the final speed of the vase

F=ma
60=5(a)
a=12

v^2 = U^2+2as
v^2=0+2(12)(10)
V^2 = 240
v= 15.49m/s

is the step correct~??

thanks for reply~
 
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bboycs said:
F=ma
60=5(a)
a=12
What about mg?
 


is that have to include mg??
 


bboycs said:
is that have to include mg??
Yes. You have three forces acting on a vase: F, mg & ma.
 


method_man said:
Yes. You have three forces acting on a vase: F, mg & ma.

then can you show me the step to get the final speed??
 

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