1.The engine of a jet airplane put a force of 6.2 kN to the plane.

The plane travels 95 km. How much work do the engines do on the plane?

(Hint: 1 kN= 1000 N)

2. You help a friend's family move a sofa across a room. Together you apply a force of 1500 N to the sofa. You do 3000 J of work on the sofa.

How far did you move it?

Guest Oct 8, 2020

#1**+2 **

w = f x d

6200 x 95000 = ......... joules

1500 N * d = 3000 j solve for d

ElectricPavlov Oct 8, 2020

#2

#6**0 **

I should have included units to make things clearer perhaps, but often the units can clutter the equation and lead to confusion:

6200 N * 95000 m = ......... j

ElectricPavlov
Oct 8, 2020