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My department just switched to the latest version ofhttps://carnot.physics.buffalo.edu/mailman/listinfo/phys-l
Serway - Physics for Scientists and Engineers. The
following problem is presented in chapter 5 (prob
26):
"A car is moving forward slowly and is speeding up.
A student claims "the car exerts a force on itslf"
or "the car's engine exerts a force on the car"
Argue that this idea cannot be accurate and that
friction exerted by the road is the propulsive force
on the car."
How would members of this list respond to this
problem? If I am standing on ice and push off from a
rigid wall, is it the wall providing the propulsive
force on my torso or is it the muscles in my arm?
Bob at PC
_______________________________________________Forum for Physics Educators
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