A vertical rope is attached to an object that has mass of 40 kg and is at rest. What is the tension in the rope needed to give the object an upward speed of 3. 5 m. S-1 in 0. 7 s.

the assestment will probley apele with cause and effect

small = small current large mag large current

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.

answer(20) psi;