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Q. 33

Expert-verified
Found in: Page 30

### Physics for Scientists and Engineers: A Strategic Approach with Modern Physics

Book edition 4th
Author(s) Randall D. Knight
Pages 1240 pages
ISBN 9780133942651

# Motor neurons in mammals transmit signals from the brain to skeletal muscles at approximately 25 m/s. Estimate how long in ms it takes a signal to get from your brain to your hand.

The time required for a signal to reach from the brain to the hand is $32ms$.

See the step by step solution

## Given information

The speed of signals from the brain to skeletal muscles is $v=25m}{s}$.

## Time required for a signal to reach from brain to hand.

Suppose the distance between your brain and your hand is $0.8m$.

The average speed is given by $v=\frac{∆x}{∆t}$.

Substitute the known values.

role="math" localid="1648567732955" $25m}{s}=\frac{0.8m}{∆t}\phantom{\rule{0ex}{0ex}}∆t=0.032\phantom{\rule{0ex}{0ex}}=32×{10}^{-3}s\phantom{\rule{0ex}{0ex}}=32ms$

Therefore, the time required for a signal to reach from the brain to the hand is $32ms$.