A person weighs a fish on a spring scale attached ...

A person weighs a fish on a spring scale attached to theceiling of an elevator, as shown in Figure 4.14. Show that if theelevator accelerates, the spring scale reads an apparent weightdifferent from the true weight of the fish.

Figure 4.14 (a) When the elevator accelerates upward,the spring scale reads a value greater than the fish's trueweight. (b) When the elevator accelerates downward, thespring scale reads a value less than the fish's trueweight.

Answers ( 1 )

  1. mustafa kavakl?o?lu
    mustafa kavakl?o?lu
    a) T - mg = ma
        T = mg + ma
        T = m(g + a) = weight going up =more than true weight

    b) T - mg = - ma
        T = mg - ma
        T = m(g - a) = weight going down =less than      true weight

    hope this helps.

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