A 1.9 kg otter starts from rest at the top of a muddy incline 84.1 cm long and slides down to the bottom in 0.60 s.
What net external force acts on the otter along the incline?
Answer in units of N.
Physics - Henry, Tuesday, January 11, 2011 at 5:22pm
d = 0.5at^2 = 0.841m.
0.5a(0.6)^2 = 0.841,
0.18a = 0.841,
a = 0.841 / 0.18 = 4.67.2m/s^2.
F = ma = 1.9 * 4.67 = 8.88N.