In the figure, blocks A and B have weights of 47 N and 22 N, respectively. (a) Determine the minimum weight of block C to keep A from sliding if u, between A and the table is 0.21. (b) Block C suddenly is lifted off A. What is the acceleration of block A if Hk between A and the table is 0.14? Frictionless, massless pulley B.

Arshia is helping Jana move. Jana has to load a 265 kg box of chocolates and coffee up an incline of 25o, which also has a coefficient of static friction of 0.50. Arshia applies a force on the box at an angle of 30o with respect to the ramp. What is the minimum force needed to slide the box up the ramp?

A 7.7-N force pulls horizontally on a 1.6-kg block that slides on a smooth horizontal surface. This block is connected by a horizontal string to a second block of mass m2= 0.83kg on the same surface. (a) What is the acceleration of the blocks? (b) What is the tension in the string? (c) If the mass of block 1 is increased, does the tension in the string increase, decrease, or stay the same? Show your work and explain.

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Two monkeys, Ham and Joey, are hanging from ropes and being pulled upward from the ground by a small rocket with an acceleration of 2.9 m/s?. The monkeys' masses are shown below. (a) Draw the free body diagram of all the forces acting on Joey. (b) Using Newton's second law, find the tension T in the rope between Ham and Joey. Ham MHam = 10 kg Joey mjoey = 8 kg

A child of mass 30 kg sits on a sled of mass 10kg which is pulled along the ice at a constant speed by a rope inclined at 30 °to the horizontal. The coefficient of friction for the ice and sled, HK, is 0.05. Calculate the pulling force in the rope. Pulling force F, pull 30° Gravity FG Normal i Friction f

Weight of a body mass 6.0 kg is 60 N. What will be the weight of a boy of mass 65 kg. (a) kgf (b) N

An elevator of mass m moving upward has two forces acting on it: the upward force of tension in the cable and the downward force due to gravity. When the elevator is accelerating upward, which is greater, T or w? Or are both forces equal?

A boat moves through the water with two forces acting on it. One is a 1700 N forward push by the water on the propeller, and the other is an 1300 N resistive force due to the water around the bow. (a) What is the acceleration of the 1100 kg boat?____ m/s 2(b) If it starts from rest, how far will it move in 9.0 s?____ m(c) What will its velocity be at the end of that time?

A book with mass = 2.25 kg rests on the surface of a bar. The coefficient of static friction between the book and the par us=0.71 and the coefficient of kinetic friction is uk=0.44.   What would the expression be for alpha, the book's acceleration, after it begins moving? Especially assuming the min force Fm continues to be applied. How is this numerically solved for acceleration in terms of a in m/s2