abbycarpenter108 abbycarpenter108

01-02-2017
Physics

Answered

If the zero level is a distance

2h/3

above the floor, what is the potential energy

U

of the block on the floor?

Verified Answer :

osprey2015 osprey2015

02-02-2017

potential energy, U ?, is given by U=mgh. so, were the zero level the floor, and the block were at the distance quoted,U would be mg2h/3.but, the q says that the zero is at 2h/3.so U = -mg2h/3. Since U is a scalar quantity, this is a "signed number", it's not a vector.

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