A 10 kg
box is being pushed up a slippery ramp as shown in Figure 2.1.
The coefficient of friction between the box and the ramp is just
μ = 0.1.
(a) What force does the man need to apply to the box to
keep it traveling up the ramp at a steady speed?
I have attached figure 2.1
The Attempt at a Solution
I worked out the normal reaction by finding the vertical component of the normal reaction acting on the box (as =mg) then i found out fmax by fmax = uN
but my answer is 10N and the actual answer is 27N!!
what did i do wrong