If the coefficient of kinetic friction between a 28 kgkg crate and the floor is 0.38, what horizontal force is required to move the crate at a steady speed across the floor? Express your answer to two significant figures and include the appropriate units. F= ______________ N

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A 24.0-kg box is released on a 27° incline and accelerates down the incline at 0.30 m/s² ▼ Part A Find the friction force impeding its motion. Express your answer to two significant figures and include the appropriate units. Ffr = 21 F Part B Submit Previous Answers Request Answer X Incorrect; Try Again μA Submit k = 17.5 m Determine the coefficient of kinetic friction. Express your answer using two significant figures. 15. ΑΣΦ ? Previous Answers Request Answer ?

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Three blocks (as shown in the figure) are released from rest and they start to accelerate with a constant magnitude of 0.44 m/s². Block A has mass M, block B has mass 1.8 M and block C has mass 2.0M. The value of M is not given. What is the coefficient of kinetic friction between the table and block B? The mass and friction in the pulleys can be ignored. A Question Help: Read Submit Question B C

6. Two blocks, with masses shown are pulled up a ramp by a pull force P. The kinetic friction coefficient between each block and the ramp is µg = 0.40. The blocks start from rėst and speed up the ramp. They reach a speed of 0.85 m/s after 4.00 s. 4.0 kg a) Draw FBDS of both masses. Write down correct NII equations. Find the magnitude of the tension in the string connecting the two blocks. 6.0 kg 30°

A block is launched up an inclined plane. After going up the plane, it slides back down to its starting position. The coefficient of friction between the block and the plane is 0.3. The speed of the block when it reaches the starting position on the trip down: A.) is the same as the launching speed. B.) cannot be compared to the launch speed with the information given. c.) is greater than the launching speed. D.) is less than the launching speed.

Suppose you have a 148 kg wooden crate resting on a wood floor, with coefficient of static friction 0.500 between these wood surfaces. (Enter the magnitudes.)   A.)What maximum force (in N) can you exert horizontally on the crate without moving it?   B.)If you continue to exert this force once the crate starts to slip, what will its acceleration (in m/s2) then be? The coefficient of sliding friction is known to be 0.300 for this situation.

The pair of pulleys is used to lift a 40-kg block 0.25 m. The constant upward acceleration of the block during the lift is +2.5 m/s^2, and the pulleys and rope have negligible inertia and negligible friction. A. What is the tension in the pulling rope? Express your answer with the appropriate units. B. What is the tension in the rope from which the block hangs? Express your answer with the appropriate units. C. Determine the magnitude of the force exerted by the upper mount on the top pulley. Express your answer with the appropriate units. D. How much work is done by the person pulling the rope in lifting the block 0.25 mm? Express your answer with the appropriate units. E. By how much does the kinetic energy of the block change in this process? Express your answer with the appropriate units. F. How much work is done on the block by the rope attached to it? Express your answer with the appropriate units. G. How much work does the ceiling do in this process? Express your answer with the…