Two objects of different mass start from rest, and pulled bythe same magnitude n

Question

Two objects of different mass start from rest, and pulled bythe same magnitude net force, and are moved through the samedistance. The work done on object A is 500J. After the force haspulled each object, object A moves twice as fast as object B.Answer the following questions and show your work. a) How much work is done on object B? _______________ b) What is the kinetic energy of object A after being pulled?_____________ c) What is the kinetic energy of object B after being pulled?______________ d) What is the ratio of the mass of object A to the mass ofobject B? __________ Two objects of different mass start from rest, and pulled bythe same magnitude net force, and are moved through the samedistance. The work done on object A is 500J. After the force haspulled each object, object A moves twice as fast as object B.Answer the following questions and show your work. a) How much work is done on object B? _______________ b) What is the kinetic energy of object A after being pulled?_____________ c) What is the kinetic energy of object B after being pulled?______________ d) What is the ratio of the mass of object A to the mass ofobject B? __________

Explanation / Answer

a) work done W= F.s for A: F.s = 500J, it should the same for object B since F is the same and s isthe same also. Answer:How much work is done on object B? 500J b) KE0 = 0 work done W = KE KE1 = W = 500J answer: What is the kinetic energy of object A after beingpulled? 500J c) the same reason as in b) answer: What is the kinetic energy of object B after beingpulled? ___500J d) let v be speed of A, and speed of B will be v/2 KEA = (1/2)mAv2 =500J   (1) KEB = (1/2)mB(v/2)2 =500J (2) (1)/(2) => 4mA / (mB) = 1 =>mA / mB = 1/4

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