|Dec3-12, 05:53 PM||#1|
Question about elevator
An elevator weighs 3.0•10^3N. It accelerates up at 1.0m/s^2. What force does the cable exert to give it this acceleration?
I know I have to find the mass first but for the acceleration, would it be gravity plus acceleration given : 9.80+1.0 ?
Also for this question:
A 20kg child steps of a skateboard(3kg)with an acceleration of .50m/s^2, what acceleration will the skateboard travel in the opposite direction.
I know u have to find the force delivered by the child first but would u use the mass of only the child or the child and the board(23kg)
|Dec3-12, 06:36 PM||#2|
|Dec3-12, 07:10 PM||#3|
How do u know when to add gravity onto the equation?
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