"A block of mass 10kg is pulled 20m up a smooth plane inclined at 45 degrees to the horizontal. The block is initially at rest and reaches a velocity of 2.0m/s at the tope of the plane. Calculate the magnitude of the force required, assuming it acts parallel to the plane."
I am unsure about the question answer, but for my attempt I used v2=u2+2as, and rearranged it to find a, then used f=ma, to find the force.
The Attempt at a Solution
I drew a diagram with a horizontal line and a line at 45 degrees to that, I then used the equation as above, rearranged to find a as 0.1ms-2 (v=2 , u=0 , s=20, so I used the rearranged formula and got a=0.1ms-2). I then substituted this value for a into F=ma, with m being the mass of 10kg, however, the only thing I am unsure about is whether I have calculated the value of a correctly to begin with, then I can easily use F=ma. All help appreciated! EDIT: So the final force I calculated was 1N.