(a) A 1 kg block of wood sits on a 30 degree incline. If an applied force of 10 N causes the block to accelerate up the ramp at 0.5 m/s^2 what is the force of friction between the block and the ramp. [K___/4]
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- Jamal and Dayo are lifting a large chest, weighing 207 lb, by using the two rope handles attached to either side. As they lift and hold it up so that it is motionless, each handle makes a different angle with respect to the vertical side of the chest (Fig. P5.76). If the angle between Jamals handle and the vertical side is 25.0 and the angle between Dayos handle and the vertical side of the chest is 30.0, what are the tensions in each handle? FIGURE P5.76A horizontal force of 680 N is needed to overcome the force of static friction between a level floor and a 269 kg crate. What is the acceleration of the crate if the 680N force maintained after the crate begins to move and the coefficient of kinetic friction is 0.15?If a block of mass 889g is being pulled with a force of 2.2N parallel to a horizontal surface with a max static friction coefficient of 0.801, but the block remains at rest what is the static friction force on the block (in unit of N)?
- A 0.85 kg block of wood is stationary on an incline that is15◦above horizontal. A force of 3.0 N is being applied toit 75◦below horizontal, directly into the incline (the force isperpendicular to the incline). What is the minimum coefficientof static friction required to keep the block stationary?A 50 kg object is acted upon by two forces (in N) F, = - 107 +50 7 and F, = 10 7 +50 7 What is the magnitude of its acce.It is desired to remove the spike from the timber by applying force along its horizontal axis. An obstruction A prevents direct access, so that two forces, one 440 lb and the other P, are applied by cables as shown. Compute the magnitude of P necessary to ensure a resultant T directed along the spike. Also find T. 3" T A 5" ✓ 440 lb Answers: P= i lb T= i lb
- At what angle ở must the 800-lb force be applied in order that the resultant R of the two forces have a magnitude of 2000 Ib? For this condition, determine the angle B between R and the vertical. 1400 Ib 800 lbThree forces in the x-y plane act on a 4.40 kg mass: 14.90 N directed at 57o, 8.40 N directed at 168o, and 5.30 N directed at 195o. All angles are measured from the positive x-axis, with positive angles in the Counter-Clockwise direction. Calculate the magnitude of the acceleration. Calculate the direction of the resultant force using the same sign convention as above (in degrees).I 00LLJ408 - Go.. Question Info and Solutions Blocks A and B of mass 5 kg and 10 kg respectively are placed on a Smooth inclined plane of Inclination 30, as shown. Block A and B are subjected to forces 5 N And 50 N respectively along the incline, as shown. The coefficient of friction between A andBis 0.50 find the frictional force between A and B in N is: (g= 10 ms SOH 300 Options Solution Fs=Static frictional force umg cos 30 (0.5) (5) (10) cos 30 21.6 N Let a be the acceleration of both the blocks along 5.27 PM
- A handtruck/dolly is being pulled up a board-ramp inclined 32° with dollyload combined weight of 296 pounds (operator of the dolly not included). It is known that the board has a maximum load carrying capacity of 242 pounds at its center (weakest point) when horizontal. Round answers to 4 decimal places. Forced pointing down are negative. W2 2 32 wi ngs |w = 296 lb a) What is the component of the weight of the dolly perpendicular to the ramp (w1)? pounds b) What is the component of the weight of the dolly parallel to the ramp (w2)? w2 = pounds c) Will the board/ramp break? d) What force is required to pull the dolly up the ramp?(a) A force F pushes on a 25kg box as shown in the figure. The coefficient of static friction between F 25 kg box and indine is µs = 0.20. How large a horizontal force must push on the block if the 40. block is to be on the verge of sliding up the incline? 40° (b) A force F applied to an object of mass m produces an acceleration of 3 m/s?. The same force applied to a second object of mass m2 produces an acceleration of 1 m/s. If mı and m2 are combined, find their acceleration under the adion of the force F?Determine the resultant ?R of the three tension forces acting on the eyt bolt. Find the magnitude of R and the angle θx which R makes with the positive x-axis. Note that F1= 563 N, F2= 345 N and F3= 296 N.