Question

PLEASE SHOW WORK AND EXPLAIN!

NASA builds a raft made of styrofoam that can just support the weight of three astronauts without submerging. The weight of each astronaut is 733 N. Neglecting the weight of the raft itself, which is very light, what is the volume of the raft?

(a)   0.11 m³
(b)   0.22 m³
(c)   0.44 m³
(d)   1.20 m³
(e)   1.50 m³

QUESTION 40**

The raft is now transported to Mars. After being loaded with the same three astronauts in the Mars colony swimming pool where g = 3.73 m/s², will the raft now

(a)   sink in the water.
(b)   float higher in the water.
(c)   float at the same height in the water.

QUESTION 41*

Assuming that water is incompressible, the buoyant force on a swimmer diving to the bottom of a pool is __________ the buoyant force on a swimmer who dives just below the surface of the water but is still fully submerged.

(a)   less than
(b)   more than
(c)   the same as

Answer 1

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