Your groceries are in a bag with paper handles. The handles will tear off if a force greater than 47.0 NN is applied to them. A} What is the greatest mass of groceries that can be lifted safely with this bag, given that the bag is raised with constant speed? m = _______kg  B) What is the greatest mass of groceries that can be lifted safely with this bag, given that the bag is raised with an acceleration of 1.20 m/s2? m = _____k

9 4a

5) A box with mass m=1.25 kg rests on the top of a bar. The coefficient of static friction between the box and the bar is μs=0.73 and the coefficient of kinetic friction is μk=0.39. a) Write an expression for Fm the minimum force required to produce movement of the box on the top of the bar.  b) Solve numerically for the magnitude of the force Fm in Newtons. c) Write an expression for a, the box's acceleration, after it begins moving. (Assume the minimum force, Fm, continues to be applied.)  d) Solve numerically for the acceleration, a in m/s².

no air resistance, g=9.81 mls^2 mB=2450 goes up ramp, and the coefficient of kinetic friction between mass b and the ramp is 0.6. The ramp makes an angle of 63 degrees  a counterweight is used to raise stone B by tying it to a second mass MA. The coefficient of friction for mA as it slides down the shaft is 0.4 pitched at an angle of 13 degrees.  question- draw a body diagram for mass B and write 2 equations for the forces in x and y direction.