Objects of masses m1 = 4.00 kg and m2 = 9.00 kg are connected by a light string that passes over a frictionless pulley as in Figure P4.48. The object m1 is held at rest on the floor, and m2 rests on a fixed incline of = 40.0°. The objects are released from rest, and m2 slides 1.50 m down the incline in 4.30 s.
a.)Determine the acceleration of each object
m1 upward and m2 down the incline
b.) Determine the tension in the string.
c.) Determine the coefficient of kinetic friction between m2 and the incline
2006-10-08 13:26:29 · 2 answers · asked by activegirl 1 in Science & Mathematics ➔ Physics
Consider the forces acting on m2. The force in the direction of motion (down the ramp) is w2*sin(40°) minus the weight of m1 and the frictional force. The frictional force is µN, where N is the normal force, w2*cos(40°).
Assume constant acceleration (a=2d/t^2), and solve for the frictional force (ΣF = ma), then extract the coefficient of friction.
2006-10-08 14:22:05 · answer #1 · answered by injanier 7 · 0⤊ 0⤋
a million. decide the forces and components. for this reason you have gravity occurring, the utilized rigidity with components up and horizontal, the conventional rigidity occurring, and the frictional rigidity going horizontal. 2. on account which you recognize gravity and the utilized rigidity, F_y,internet = 0 assist you to grasp what the conventional rigidity is. 3. then you definately know a_x so which you will discover F_x,internet by skill of F = ma. 4. as quickly as you have F_x, you recognize that the x forces are (a) the utilized rigidity and (b) mu * F_N. the only unknown is mu so resolve for it. Get it?
2016-12-13 04:33:58 · answer #2 · answered by Anonymous · 0⤊ 0⤋