Question

For the path PQR in a conservative force field the amounts work done in carrying a body from P to Q and from Q to R are 5 Joule and 2 Joule respectively. The work done in carrying the body from P to R will be-
a) 7 J
b) 3 J
c)√21 J
d) zero

Answer 1

i m not sure but can be 7 cuz P to Q= 5 and Q to R= 2 and P to R= ( p to q) + ( q to r) i.e., 5+2= 7