1.A 0.05kg bullet travelling at 500m/s horizontally strikes a - TopicsExpress



          

1.A 0.05kg bullet travelling at 500m/s horizontally strikes a thick vertical wall.it stops after penetrating through the wall a distance of 0.25m.What is the magnitude of the average force the wall exerts on the bullet? A.25N B.50N C.250N D.5000N E.25000N 2.A steam engine of efficiency 50% burns 1g of coal to produce 10000J of energy.If it burns 20g per second. Calculate the output power A.100KW B.200KW C.250KW D.400KW E.500KW 3.A 12g bullet is fired from a 4.0kg riffle with a speed of 30m/s.calculate the recoil speed of the riffle. A.0.09m/s B.0.4m/s C.0.9m/s D.7.5m/s
Posted on: Fri, 05 Dec 2014 02:04:02 +0000

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