A block of mass m = 1kg, to which a spring of spring constant k = 43N/m is attached, stands on a horizontal plane. If the spring attached to that block can be stretched horizontally with an amount of 14.8cm until the block skids, what is the coefficient of static friction between the block and the surface of the plane?

A block with a mass of 6.18kg slides down a ramp inclined at 30.0o.  The coefficient of kinetic friction between block and ramp is uk=0.490. The kinetic friction force acting on the block as it slides has a magnitude of ________N.

A rope attached to an engine pulls a 839 N crate up an 18.0° ramp at constant speed. The coefficient of kinetic friction for the surfaces of the crate and ramp is 0.19. What is the magnitude of the force that the rope exerts on the crate parallel to the ramp?

Problem 6. A 6.0kg block is placed on top of a 9.0kg block. A horizontal force of 50.0N is applied at an angle to the 9.0kg block, and the 6.0kg block is tied to the wall by a rope. The coefficient of kinetic friction between the two blocks is 0.25, and the coefficient of friction between the 9.0kg block and the ground surface is 0.30. (a) Draw a free body diagram for each block and identify the action-reaction forces between the blocks. (b) Determine the tension in the rope. (c) Determine the magnitude of the acceleration of each block. 6.0kg F = 50.0N 15° 9.0kg

A 5kg crate is simultaneously acted upon by a force of 60N acting to the right that is parallel to the surface, and a force of 10N acting to the left, which makes a 30 degree angle with the horizontal. If the coefficient of kinetic friction is 0.15, then the magnitude of the acceleration of the crate is about _____ m/s2.

Problem 1: A 2.80kg block is placed on a rough (us=0.540) incline that makes an angle of 52.0° with respect to the horizontal. A pushing force horizontal to the ground is applied to the top of the block (This would make the force have an angle of 52.0° below the surface of the inclined plane, up the plane) to make the block stationary on the plane. What is the minimum pushing force needed to keep the block stationary on the plane? (10 points)

A 1,480-N crate is being pushed across a level floor at a constant speed by a force of 350 N at an angle of 20.0° below the horizontal, as shown in the figure a below. F 20.0° / 20.0° a b (a) What is the coefficient of kinetic friction between the crate and the floor? (Enter your answer to at least three decimal places.) (b) If the 350-N force is instead pulling the block at an angle of 20.0° above the horizontal, as shown in the figure b, what will be the acceleration of the crate? Assume that the coefficient of friction is the same as that found in part (a). m/s²

A 1,500-N crate is being pushed across a level floor at a constant speed by a force F of 370 N at an angle of 20.0° below the horizontal, as shown in the figure a below. F 20.0° / b 20.0° (a) What is the coefficient of kinetic friction between the crate and the floor? (Enter your answer to at least three decimal places.) 0.220 X Your response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation. Carry out all intermediate results to at least four-digit accuracy to minimize roundoff error.

When the load L is 4.7 m from point C, the tension T in the cable has a magnitude of 5.4 kN. Express T as a vector using the unit vectors i and j. Assume a = 4.7 m, b = 2 m, c = 4.3m. T x j) kN L b Answer: T = (i it i

You are a bully.  You pin a 48 kg dweeb to a wall so that his feet aren't touching the ground.  Your arm is extended so that it makes an angle 28 degrees with the horizontal.  The dweeb's back is so sweaty with fear that there is no friction between his back and the wall.  What is the magnitude of the force , in N, you must apply to keep the dweeb in equilibrium? (Use g = 10 m/s2) This scenario is represented schematically below.  Unfortunately for you, years later the dweeb is your boss and he makes your life miserable. (Please answer to the fourth decimal place - i.e 12.3445)