well: forcefriction*time= mass*changevelocity
mu*mg*time= mass(Va-Vb)
solve for time. Notice mass divides out.
A sled slides along a horizontal surface on which the coefficient of kinetic friction is 0.30. Its velocity at point A is 7.6 m/s and at point B is 4.0 m/s. Use the impulse-momentum theorem to find how long (in s) the sled takes to travel from A to B. Assume that the local acceleration due to gravity is -9.80 m/s2.
1 answer
1 answer