Question

What minimum speed does a 150g puck need to make it to the top of a frictionless ramp that is 3.1m long and inclined at 29∘? what equation should be used ?

Answer 1

You'll want to use the idea of conservation of energy

Answer 2

You could use trig functions

Answer 3

use sin function to calculate h

energy at the top of the slope = mgh
kinetic energy = 0.5mv^2

so minimum speed to reach top of ramp is when

0.5 mv^2 = mgh

(note that m cancels - so the result is tru for all masses)

solve for v