Question

10. A woman lifts a box weighing 40 N from the floor to a shelf 1.5 m above. (a) Find the work done by the
force (F) the woman exerts on the box. (b) Find the work done on the box by its own weight (w). (c) Find
the network done on the box.
(Ans. (a) 603(S) - 60) (c)​

Answer 1

Answer:

Explanation:

a)F=40 N

S=1.5 M

W1=FORCE*DISPLACEMENT

=40*1.5=

60 JOULE

b) W2=F*S=40*1.5=60 JOULES

C)NET WORK=W1-W2=60-60=0 JOULES