Sin A screw jack is used to raise a body of mass 6000kg through a height of
0.25m by turning its tommy bar through 30 revolutions. If the length of its
tommy-bar. is 0.75m and the jack is 85% efficient, calculate
(ii)
its velocity ratio,
the effort required to raise the body.
[T = 3.14, g = 10ms)​

Which sound characteristic is not affected by the relative motion of an object

What is the coefficient of kinetic friction μk between the block and the tabletop?

Choose a realistic problem for which these are the correct freebody diagrams. be sure that the answer that the problem requests is consistent with the diagrams shown. choose a realistic problem for which these are the correct freebody diagrams. be sure that the answer that the problem requests is consistent with the diagrams shown. a 1.0 kg block is placed on top of a 2.0 kg block. a horizontal rope pulls the 2.0 kg block across a frictionless floor with a force of 21.0 n. the coefficient between the two blocks is 0.75. does the 1.0 kg block on top slide?