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THE MASSES Ma and Mb SLIDE ON THE SMOOTH INCLINED PLANES (WITHOUT FRICTION). DETERMINE  A FORMULA FOR THE ACCELERATION OF THE SYSTEM IN TERMS OF mA,mB θA, θB AND g. B) IF θA= 32, θB=23 AND mA= 5.0kg, what value of MBwill keep the system at rest? What would be the tension in the string in this case (neglect mass)?

two masses are connected by a light string that passing over a frictionless pulley. Mass m1 =3.34kg is on a 50.0-degree incline, and mass m2 =14.2 kg is hanging on the string. the system starts from rest. If the coefficient of the friction between m1 and the incline is 0.878, find the acceleration of the system, in m/s^2.

An 18.5 lb box is placed on the ground. What force (in lb) does the ground exert on the box? (magnitude and direction). A cord is attached to the box and run through a pulley directly above the box, so that the cord is vertical. The free end of the cord is then connected to a hanging weight. Calculate the force exerted by the ground on the box (in lb), if the hanging weight is 12.0 lb (magnitude and direction) A 29.0 lb weight is substituted for the 12.0 lb weight. Calculate the new force (in lb) exerted by the floor on the box (magnitude and direction).

An elevator cab that weighs 22.2 kN moves upward. What is the tension in the cable if the cab's speed is (a) increasing at a rate of 1.08 m/s? and (b) decreasing at a rate of 1.08 m/s? (a) Number i Units (b) Number i Units

(a) Calculate the tension (in N) in a vertical strand of spiderweb if a spider of mass 8.00 x 10¯° kg hangs motionless on it. (Enter a number.) 0.000784 N (b) Calculate the tension (in N) in a horizontal strand of spiderweb if the same spider sits motionless in the middle of it much like the tightrope walker in the figure. 5.0° 5.0° T. TR w T. TR The strand sags at an angle of 15.0° below the horizontal. (Enter a number.) 0.046688914 X N Compare this with the tension in the vertical strand (find their ratio). (Enter a number.) (tension in horizontal strand) / (tension in vertical strand) =

The crate A weighs 780 lb. Between all contacting surfaces, μs = 0.34 and μk = 0.29. Neglect the weights of the wedges. What force F is required to move A to the right at a constant rate? Wedge angle is 6 degrees.

Two packing crates of masses m₁ = 10.0 kg and m₂ = 7.10 kg are connected by a light string that passes over a frictionless pulley as in the figure below. The 7.10-kg crate lies on a smooth incline of angle 41.0°. Find the following. m₁ m₂ 8 (a) the acceleration of the 7.10-kg crate 4.123 X m/s² (up the incline) (b) the tension in the string N

An elevator cab that weighs 23.2 kN moves upward. What is the tension in the cable if the cab's speed is (a) increasing at a rate of 1.02 m/s? and (b) decreasing at a rate of 1.02 m/s?? (a) Number i Units (b) Number i Units

A 20kg block is placed on a 30 degree ramp and an acceleration of 4.91m/s^2 is predicted if friction between the block and ramp is ignored. The actual measured acceleration is 3.49m/s^2. Find the Coefficient of friction between the block and the ramp.