Identify the following as being always true(AT), never true (NT) or might be tru

Question

Identify the following as being always true(AT), never true (NT) or might be true (MBT)

a)If gravity does work upon an object, then its total mechanical energy (TME) is conserved.

b) If gravity is then only force doing work upon an object, then its total mechanical energy (TME) is conserved.

c) If a normal force acts upon an object, then its TME will change.

d)If sliding friction does work upon an object, then its TME will decrease.

e) If only external forces are doing work upon an object, then its TME will be conserved.

f) If both internal and external forces are doing net work upon an object. then more information is needed to tell if its TME will be conserved.

g) If a quantity such as the total mechanical energy is conserved, then that means that it does not change over the course of a motion.

Explanation / Answer

a) MBT b) AT c) NT d) AT e) NT f) MBT g) MBT

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