Physical Sciences P1 (Physics) Gr 1223FS/2017The block moves from point B at a velocity of 4,95 m:s1 up a rough inclined plane to point C.The speed of the block at point C is 2 m:s1. Point C is 0,5 m above the horizontal, as shown inthe diagram below. During its motion from B to C a uniform frictional force acts on the block.4,95 m-s12 kg0,5 m6.2State the work-energy theorem in words.6.3Use energy principles to calculate the work done by the frictional force when the 2 kgblock moves from point B to point C.QUESTION 8The diagram below shows a bullet of mass 20 g that is travelling horizontally. The bullet strikesa stationary 7 kg block and becomes embedded in it. The bullet and block together travel on arough horizontal surface a distance of 2 m before coming to a stop.20 g7 kg2 m3.1Use the work-energy theorem to calculate the magnitude of the velocity of the bullet-block system immediately after the bullet strikes the block, given that the frictionalforce between the block and surface is 10 N.2State the principle of conservation of linear momentum in words.

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