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A 1.9 kg otter starts from rest at the top of a muddy incline 82.5 cm long and slides down to the bottom in 0.40 s What net external force acts on the otter along the incline Answer in units of N?
Wiki User
∙ 12y ago
mass = 1.9 kg
distance (s) = 0.825 metres
time (t) = 0.4 seconds
initial velocity (u) = 0 metres/sec
to find acceleration (a)
shuffle s = ( u * t ) + ( 0.5 * a * t^2 ) to isolate a
a = s - ( u * t ) / ( 0.5 * t^2 )
a = ( 0.825-0 ) / ( 0.5 * 0.16 )
a = 0.825 / 0.08
a = 10.3125 ( m / s ) / s
force required to give 1.9 kg mass an acceleration of 10.3125 ( m / s ) / s
f = m * a
f = 1.9 * 10.3125
f = 19.59 newtons
Wiki User
∙ 12y ago
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