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**r-soy** 1 ) A vacum cleaner is pulled with a force of 40 N making an angle of 25 with the floor . If it is dispaced along the floor through 3 m , calculate the work done on i .

2 ) A car of mass 1500 kg being towed has a net foward force of 4500 N applied to i . The car starts from rest and travels down a horizontal highway . Find the speed of the car after it has travelled 200 m .

ny answer >

1)

w = FocQ Dx

=40cos25

=108.7 J

2 )

pe = pe = w = 1/2mv^2

1/2mv^2 = fcos180 200

v^2 = -1200

v = 34.6

speed =

34. 4