Three-dimensional measuring references all of these EXCEPT:
1 answer:
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Answer:
(a) 0 kJ
(b) 9.81 kJ
(c) 31.32 m/s
Explanation:
(a)
From the law of conservation of energy, energy can only be transformed from one state to another. At a height of 50 m, all the kinetic energy is converted to potential energy hence KE=0
(b)
Potential energy, PE=mgh where m is the mass, g is acceleration due to gravity and h is the height
Substituting 50 m for h and 20 Kg for m, taking g as 9.81 then
PE=20*9.81*50=9810 J=9.81 kJ
(c)
Relating the equation of potential energy to the equation of kinetic energy, which is
where v is the velocity of the mass
Substituting 50 m for h and taking g as 9.81 then
Answer with Explanation:
Given that
Thus by definition x component of velocity in Lagrangian system is given by
Thus by definition y component of velocity in Lagrangian system is given by
Since in eulerian system we need to eliminate time from the equations
From euations 'i' and 'ii' we can write
Applying these values in the velocity components as obtained in Lagrangian system we get