1. The block below is pulled a distance of 2.50m. How much work is done by the f

Question

1. The block below is pulled a distance of 2.50m. How much work is done by the force? Show your work and include units. 2. Now the force acts in a direction 30 degree above the horizontal as shown below. If the block is again moved 2.50 m, how much work is done by the force? Show your work and include units. 3. Two objects of different mass start from rest, are pulled by the same magnitude net force, and are moved through the same distance. The work done on object A is 500 J. After the force has pulled each object, object A moves twice as fast as object B. Answer the following questions and show your work. How much work is done on object B? What is the kinetic energy of object A after being pulled? What is the kinetic energy of object B after being pulled?

Explanation / Answer

1.

Work done

W=F*d*Cos(x)

Here x=0o ,since force and displacement are in the same direction ,so

W=4.5*2.5*Cos(0)

W=11.25 J

2.

Work done

W=FdCos(o)=4.5*2.5*Cos30

W=9.74 J

3.

a)

Work done on object B is

WB=500 J

b)

Kintiec energy of object A is

KEA=500 J

c)

Kineitc energy of object B is

KEB=500 J

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

---

---

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