Please show all work done to find answers 1) a tractor of mass1=2,000 kg is oull

Question

Please show all work done to find answers

1) a tractor of mass1=2,000 kg is oulling a trailer of mass2=5,000 kg. the wheels of the trailer only are subject to friction with coefficient 0.2. if the trailer-tractor is accelerated at 2.0m/s2 then the force supplied by the tractor is?

2) a tractor of mass1=2,000 kg is pulling a trailer of mass2=5,000 kg. the wheels of the trailer only are subject to friction with coefficient 0.2. if the trailer-tractor is accelerated at 2.0m/s2 then the tension of the trailer hitch that connects the trailer to the tractor is?

3) An ant crawls in a straight line at a constant speed of 0.24m/s, beginning in the corner of a square classroom, for 3.0m. it then turns exactly 90 degrees to the right and proceeds an additional 4.0m with a constant speed of 0.44m/s, reaching the other corner of the same wall from which it began. What was the average speed for the full trip from corner to corner?

Explanation / Answer

1.F = mass* acceleration

F = force supplied by tractor(Fs) - friction force

friction force = friction cofficient*normal = 0.2*5000*9.8 = 9800 N ( mormal = m2*g)

Fs- 9800 = (2000+5000)*2

Fs = 23800 (B)

2. T - friction force = M2*a

T-9800 = 5000*2

T = 19800 N (B)

3. Average speed = total distance/total time = (3+4)(t1+t2)

t1 = 3/.24 t2 = 4/.44

Average speed = 0.32m/sec (C)

Average velocity = total displcement/time = 5/(t1+t2) = 0.23m/sec

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