A sled weighing 61.0 N is pulled horizontally across snow so that the coefficient of kinetic friction between sled and snow is 0.100. A penguin weighing 73.0 N rides on the sled, as in Fig. P4.76. If the coefficient of static friction between penguin and sled is 0.700, find the maximum horizontal force that can be exerted on the sled before the penguin begins to slide off.
2007-10-10 07:47:15 · 1 answers · asked by swimchic632 2 in Science & Mathematics ➔ Physics
Calculate the friction, Ff, between the penguin and the sled. It is that friction that applies force to the penguine. At the maximum acceleration, the friction will be at its limit of its ability to bring the penguine along. You need to calculate the penguine's mass. Use this and Ff = m*a to find the maximum acceleration the system can accept without the penguine slipping.
The sled also undergoes that same acceleration. Total up the masses and find the force that causes the total mass to accelerate the known amount. Add the force of friction between the sled and snow.
2007-10-10 10:14:37 · answer #1 · answered by sojsail 7 · 0⤊ 0⤋