2. Two blocks are sliding to the right across a horizontal surface, as Fig. 2 shows. In Case A, the mass of each block is 3.0 kg. In Case B, the mass of block 1 (the block behind) is 6.0 kg, and the mass of block 2 is 3.0 kg. No frictional force-acts on block 1 in either Case A or Case B. However, a kinetic frictional force of 5.8 N does act on block 2 in both cases and opposes the motion. For both Case A and Case B determine: Block 1 Block 2 Block 1 Block 2 m1 = 3.0 kg m2 = 3.0 kg m1 = 6.0 kg m2 = 3.0 kg %3D Case A Case B Fig. 2 (a) ( the magnitude of the forces with which the blocks push against each other. (b) the magnitude of the acceleration of the blocks. (c) ( ) the coefficient of kinetic friction between the horizontal surface and block 2.

2. The block of mass m, in the figure has been adjusted so that the block of mass m, is on the verge of sliding. (a) If m1 = 7 kg and m2 = 5 kg , what is the coefficient of static friction between the table and the block? (b) With a slight nudge, the blocks move with acceleration of magnitude a. Find a if the coefficient of kinetic friction between the table and the block is µ = 0.54 m2

A stack of two crates is being accelerated upwards by two cables. The cables are directly attached to crate 1 and the tension in each cable is 3248 N. You may assume that the masses of the cables are negligible compared to the masses of the crates. The acceleration of the crates is? bottom crate crate 1 is 109 kg. the top crate is 248 kg.

A constant net force causes an acceleration of 20 m/s². What will be the acceleration of the object if the force is halved? Enter to 2 significant figures m/s² a = A constant net force causes an acceleration of 20 m/s². What will be the acceleration of the object if the mass is doubled? Enter to 2 significant figures m/s² a =

The hanging sphere off the table has a mass of 2.51 kg. The string makes a 32.9° angle to the ceiling. How much does the sphere weigh?    Find T1     Find T2       The block on the table does not move.  How much friction must be acting between the table and the block?

Block 1 (10 kg) is pulled by a rope from left to right up a ramp which is inclined 50 degrees from the horizontal. The rope pulls on block 1 with a force of 150 N parallel to the surface of the inclined plane. The coefficient of kinetic friction between the block and the surface equals 0.3. Weight force on block 1 by EarthW1E = Tension force on block 1 by RopeT1R = Normal force on block 1 by SurfaceN1S = Frictional force on block 1 by Surfacef1S = What is the acceleration a of block 1?a =

The two forces F₁ and F₂ shown in the figure (Figure 1) (looking down) act on a 16.0-kg object on a frictionless tabletop. igure 90° F₂ y F₂ 120° (b) 1 of 1 Part A If F₁-12.0 N and F2-21.0 N, find the magnitude of the net force on the object for (a). F = Submit Part B 0 = Find the direction of the net force on the object for (a). Submit Part C 15. ΑΣΦ Request Answer Submit VE ΑΣΦ Request Answer Find the magnitude of the acceleration of the object for (a). 135) ΑΣΦ Request Answer Pearson ? N O from the + axis m/s²

Two blocks connected by a rope of negligible mass are being dragged by a force at a 21° angle above horizontal (see figure below). Suppose F = 117.0 N, m, = 10.0 kg, m, = 26.0 kg, and the coefficient of kinetic friction between each block and the surface is 0.136. Use g=9.8 m/s?. T m2 (b) Determine the acceleration of the system. m/s2 (c) Determine the tension T in the rope. N