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An aluminum object is weighing ? ?? is dropped from the height of ??? with air...

An aluminum object is weighing ? ?? is dropped from the height of ??? with air resistance of ?? ?. ???/? obtain the maximum velocity and the distance of object at any time if ? = ?? ?/???2

Engineering   Mechanical-Engineering   
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Answer #1

Given data:-

weight = 2kg

Height = 50m

Air Resistance = 10Ns/m

Accleration due to gravity = 10m/s2

We know that

Air resistence + gravity= K.E

Against air resistance = -(1/2 mv2 - mgh)

and also W=m.g m= w/g = 2/10 = 0.2kg

10=-(1/2 *0.2*v2 - 0.2*10*50)

10=-(0.1V2-100)

10= -0.1V2 +100

V2=90/0.1 V2=900 V= = 30

V = 30m/s ans

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