A 41.8 kg box is on a frictionless 20° slope and is connected via a massless string over a massless, frictionless pulley to a hanging 19.5 kg weight. a. What is the tension in the string if the 41.8 kg box is held in place, so that it cannot move?  (N) b. What is the tension in the string once the box begins to move?  (N)

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

Matthew wants to push a 12.0 kg chair to his desk. The coefficient of kinetic friction is 0.45.a. If Matthew pushes the chair with a force of 120 N, determine the acceleration of the chair?b. As Matthew continues to push the chair with a 120 N force, his classmate Luke applies a 45 N force in the opposite direction. What is the acceleration of the chair now?c. Instead, Luke decides to apply a 45 N force downwards. Determine the acceleration of the chair. (Hint: be sure to determine FN first)

2. Box 1 (m₁ = 1.8 kg) sits on a frictionless surface that is inclined at an angle from horizontal. It is connected to box 2 (m₂ = 2.4 kg) using a lightweight flexible cord that passes over a lightweight frictionless pulley (see figure). When a vertical force F of magnitude 5.0 N pushes up on box 2, the box has a downward acceleration of 4.5 m/s². Find a. the tension in the connecting cord, and b. the angle of the inclined surface. B mq

A 1.5 kg brick is placed on an inclined plane. The inclined plane forms an angle of 30° with the horizontal. There is a string attached to the brick that passes over a pulley with a 3.0 kg hanging mass attached. If the coefficient of friction between the brick and the plane is 0.20. a) What is the acceleration of the brick? b) What is the tension in the string? 30° m₁

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

Three sleds with mass m are being pulled horizontally on a frictionless horizontal ice surface using ropes. That is, the first sled is pulled by rope, the first sled is attached to the second sled by another rope, and the second sled is attached to the third sled by a third rope. The first sled is being pulled with a force of 190 N. What is the acceleration of the sleds? a) What is the tension in the rope pulling the second sled? b) What is the tension in the rope pulling the third sled? c) Heche d to c blook with mess A ka thot reeto on e frieL:

Migo exerts a horizontal force on a 2 kg box located on an inclined plane with an angle of θ= 37 degrees. The coefficient of static and kinetic friction between the box with an inclined plane is μs = 0.4 and μk = 0.2, respectively. A. What is the minimum force for the box to move exactly B. What is the maximum force for the box to move exactly C. If the box is falling at an acceleration of 0.5 m/s^2, what is the force applied

Two objects of masses m1 and m2, with m1 greater than m2, are connected by a string and sit on a perfectly smooth horizontal surface. Mass m2 is to the right of mass m1. A horizontal force F, directed to the right, is applied to m2, accelerating the bodies to the right. Which statement correctly describes the magnitude of the tension force in the string connecting the two masses? a. The tension is less than F but greater than zero. b. The tension equals F. c. The tension equals zero. d. The tension is greater than F. e. An expression for the tension magnitude cannot be determined without more information.