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?
+36916 w = f x d
6200 x 95000 = ......... joules
1500 N * d = 3000 j solve for d
+36916 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
