cq_1_271

phy201

Your 'cq_1_27.1' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.

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Seed 27.1

A ball of mass 400 grams is immersed in water. The ball is suspended in the water by a rubber band chain which exerts a tension force

of 2.5 Newtons on the ball.

What is the weight of the ball?

answer/question/discussion: ->->->->->->->->->->->-> :

The weight of the ball is .4kg * 9.8m/s^2 =3.92N

#$&*

What is the buoyant force on the ball?

answer/question/discussion: ->->->->->->->->->->->-> :

Buoyant Force = 400 g per cm^3

Gravity pulls down, the rubber band pulls up. The forces are not equal and opposite, but the mass is in equilibrium. So there must be a third force--in this case the buoyant force.

#$&*

What therefore must be its volume?

answer/question/discussion: ->->->->->->->->->->->-> :

400cm^3 is the volume

#$&*

What is its density?

answer/question/discussion: ->->->->->->->->->->->-> :

d= m/v

d= 400g/400cm^3= 1

#$&*

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about 20 minutes

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&#Please compare your solutions with the expanded discussion at the link

Solution

Self-critique your solutions, if this is necessary, according to the usual criteria. Insert any revisions, questions, etc. into a copy of this posted document. Mark any insertions with &&&& so they can be easily identified. &#