1) What will a spring scale read for the weight of a 66 kg woman in an elevator that moves as follows?
a) upward with acceleration of 0.31g? (in newtons)
b) downward with acceleration 0.31g? (in newtons)
and
2) Estimate the force a person must exert on a string attached to a 0.100 kg ball to make the ball revolve in a circle when the length of the string is 0.600 m. The ball makes 1.00 revolutions per second. Do not ignore the weight of the ball. In particular, find the magnitude of FT, and the angle ϕ it makes with the horizontal. [Hint: Set the horizontal component of FT equal to maR; also, since there is no vertical motion, what can you say about the vertical component of FT?]
I'm completely lost. Please help
a) upward with acceleration of 0.31g? (in newtons)
b) downward with acceleration 0.31g? (in newtons)
and
2) Estimate the force a person must exert on a string attached to a 0.100 kg ball to make the ball revolve in a circle when the length of the string is 0.600 m. The ball makes 1.00 revolutions per second. Do not ignore the weight of the ball. In particular, find the magnitude of FT, and the angle ϕ it makes with the horizontal. [Hint: Set the horizontal component of FT equal to maR; also, since there is no vertical motion, what can you say about the vertical component of FT?]
I'm completely lost. Please help