the same greater less for some angles of incline and greater for other less or g

Question

the same greater less for some angles of incline and greater for other less or greater depending on the magnitude of applied force A block of mass m is pulled along a horizontal floor by an applied force F as shown in fig 10. The normal force acting on the block is: mg - F sin theta mg - F cos theta mg + F cos theta mg + F sin theta Two blocks are connected by a string and pulley as shown in Fig 11. Assuming that the string and pulley are massless, the magnitude of acceleration of each block is: 0.049 m/s 2 0.020 m/s 2 0.0098 m/s 2 0.54 m/s 2 0.98 m/s 2 A 50 N force acts on 2 kg crate that starts from rest. When the force has been acting for 2 s, the rate at which it is doing work is: 75 W 2500W 1000W 5000W 100 W

Explanation / Answer

Assuming you want (12) b/c you have answers written for the others. Rate at which it is doing work = dw/dt = Power = Work / time Work = F*d F = ma 50 = 2*a A = 25 x(t) = 1/2*a*t^2 = 1/2*25*2^2 = 50 meters

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