Force Problems with Motion Video Lessons

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Problem: Scallops eject water from their shells to provide a thrust force. (Figure 1) shows a smoothed graph of actual data for the initial motion of a 25g scallop speeding up to escape a predator.What is the magnitude of the net force needed to achieve this motion?Express your answer to two significant figures and include the appropriate units.

FREE Expert Solution

Acceleration,

a=vt

Newton's second law,

ΣF=ma

a=(0.2-0.0) m/s(0.2-0.0) s

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Problem Details

Scallops eject water from their shells to provide a thrust force. (Figure 1) shows a smoothed graph of actual data for the initial motion of a 25g scallop speeding up to escape a predator.

What is the magnitude of the net force needed to achieve this motion?

Express your answer to two significant figures and include the appropriate units.

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