The ramp (picture link) is 18 meters long and 4.5 meters high.
*picture link: http://img206.imageshack.us/img206/2450/scangd4.jpg
a.What force, parrallel to the ramp (Fa) is required to slide a 25 kg box at constant speed to the top of the ramp if friction is disregarded?
b. What is the IMA of the ramp?
c. What are the real MA and the efficiency of the ramp if a parrallel force of 75 N is actually required?
Please help me with this problem.
I'm having trouble understanding it.
2007-01-12 14:01:19 · 2 answers · asked by vicky p 1 in Science & Mathematics ➔ Physics
Dear Vicky,
1 Draw a large diagram of the problem using a ruler etc
2 Identify all the forces on the body and Draw arrows (vectors) representing all the forces acting on the body. (weight, push etc)
3 Resolve the forces into components: a) parallel with the slope
b) perpendicular to the slope.
4 Newton's 2nd law says the body will slide at constant speed when a force equal and opposite to the component of its weight acting along the slope is applied.
The IMA and MA are obtained easily. Look up the Theory of Machines in a textbook if you don't understand your notes.
2007-01-16 08:26:32 · answer #1 · answered by Rufus Cat 4 · 0⤊ 0⤋
a) The vertical component of force Fa must be equal to Fg.
You can multiply Fa by the ratio of the two dimensions so that
Fa * 4.5 / 18 = Fg
Fa = Fg * 18/4.5 = 25kg * g * 18/4.5
b) What's IMA
c) ?
2007-01-12 14:09:29 · answer #2 · answered by kokomojuggler 2 · 0⤊ 0⤋