WE-3 Atx-2m a 3kg block has a Velocity of +4m/s. The net FN)20 force on the...

Question

Question

Answer 1

Answer #1

a] Work done = area under Fx curve

= 0.5*(10+5)*2 + 0.5*5 + 0.5*-15 + 2*-15

= -20 J answer

b] final KE = initial KE + work done

= 0.5*mu^2 - 20

= 0.5*3*4^2 - 20

= 4 J answer

Answer 2

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