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Chapter 1: Q. 33 (page 30)
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.
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Convert the following to SI units:
a. b.
c. d.
For Problem 38, draw a complete pictorial representation. Do not solve these problems or do any mathematics.
A speed skater moving across frictionless ice at 8.0 m/s hits a 5.0-m-wide patch of rough ice. She slows steadily, then continues on at 6.0 m/s. What is her acceleration on the rough ice?
You are watching a jet ski race. A racer speeds up from rest
to 70 mph in just a few seconds, then continues at a constant
speed. Draw a basic motion diagram of the jet ski, using images
from the video, from 10 s before reaching top speed until 10 s
afterward.
Write a short description of the motion of a real object for
which FIGURE EX1.20 would be a realistic position-versus-time graph.
Draw a pictorial representation for the following problem. Do
not solve the problem. What acceleration does a rocket need to reach a speed of 200 m/s at a height of 1.0 km?
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