A supermarket pushcart is being pushed at 45 degrees with respect to the horizontal from the starting point to the cashier, which is 25 feet away. The cart is 5kg, it contains 2 boxes of 10-1b flour and seven packs of half-kilogram sugar. The coefficient of friction between the wheels and the floor is 0.03. a. What force is required? b. How much force is required?

Block A weighs 100.0 N, the coefficient of static friction between the surface on it rests is 0.45. The weight W is 10.0N and the system is at rest. 1. What is the friction force on block A? 2. Find the maximum weight W at which the system remains at rest.

4. Block A in the figure has a mass of 4.00 kg and block C has a mass of 13.9 kg. The coefficient of kinetic friction between block B and the horizontal surface is 0.287. a. What is the mass of block B if block B is moving to the right and speeding up at a rate of 1.45 m/s²? b. What is the tension in each cord when block B has this acceleration? A B

Calculate the magnitude of a normal force on a 22.7 kg block in the following circumstances. a. the block is resting on a level surface. b. the block is resting on a surface tilted up at 40.8 degrees with respect to the horizontal. c. the block is resting on the floor of an elevator that is accelerating upward at 2.53 m.s^2 d. the block is on the level surface and a force of 115 N is exerted on it at an angle of 40.8 degrees below the horizontal.

W S Sand X 1. Two known forces F₁ = 3.85 N at 78.0° below the positive x-axis and F₂ = 3.25 N at 35.0° above the negative x-axis are acting on an object. What is the magnitude of the third force F3 so that the acceleration of the object is zero? N 3 2. A person stands on a bathroom scale in a motionless elevator. When the elevator begins to move, the scale briefly f the person's regular weight Calculate the magnitude of the acceleration of the elevator reads 1 38 E D C $ 4 SER R F 5 V B T MacBook Air Y B H 8 N J 9 DD M MOSISO command

A 4.10-kg block is at rest on a horizontal floor. If you push horizontally on the 4.10-kg block with a force of 12.0 N, it just starts to move. a. What is the coefficient of static friction? b. A 7.00-kg block is stacked on top of the 4.10-kg block. What is the magnitude F of the force, acting horizontally on the 4.10-kg block as before, that is required to make the two blocks start to move together? answer in N

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A 10-lb block of steel is at rest on a horizontal table. The coefficient of static friction between block and table is 0.50. a. What is the magnitude of the horizontal force that will just start the block moving? b. What is the magnitude of a force acting upward 60° from the horizontal that will just start the block moving? c. If the force acts down at 60° from the horizontal, how large can it be without causing the block to move?

A 500 kg piano is being lowered into position by a crane while two people steady it with ropes pulling to the sides. Bob’s rope pulls to the left, 15° below horizontal, with 500 N of tension. Ellen’s rope pulls toward the right, 25° below horizontal.a. What tension must Ellen maintain in her rope to keep the piano descending vertically at constant speed?b. What is the tension in the vertical main cable supporting the piano?

A 1.5 kN block rests on a horizontal plane. The coefficient of kinetic friction is 0.1. A. Determine the time elapsed in seconds before the block reaches a velocity of 14.5 m/s starting from rest if it is acted upon by a horizontal force of 250N. B. How much longer (in seconds) will the block continue to move if the 250 N force is then removed?