1441 EXAM 3 2) Various similar boxes are being Pus force as shown below. The mas

Question

1441 EXAM 3 2) Various similar boxes are being Pus force as shown below. The mass of the are given in the indicated figures. a n thow. The te being pushed for 10 m across a loor by a net horizontal dcated foth boxes and the net horizontal force for each case 20 kg F-100 N 50N 15 kg 10 kg F 100 N F 75 N F-100 N 10 kg 15 kg from the greatest change in kinetic en Rank the change in kinetic energy for each box to the least change in kinetic energy. All boxes have an initial velocity of +10 m/'s direction is to the right and - to the left with - 4

Explanation / Answer

from the relation work energy theorem

work = chage in kinetic energy

wa = f*d = 100*10 = 1000 J

wb = 50*10 = 500 J

wc = 75*10 = 750 J

wd = 75*10 = 750 J

we = 100*10 = 1000 J

wf = 100*10 = 1000 J

work = fdcos(theta)

here given force and displacement are in smae direction

but body weght is perpendicular to the displacment so work by own weight is zero

ranking:

wa=we=wf (greatest)

next wc=wd

least wb

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.