Which of the following is correct about the. girls moving the sack bags as shown in the above diagram? 1. Girl a has to work more against friction. 2. Girl b does not Slave to work against friction. 3. The wheels of the trolley have reduced the friction.

Which of the following is correct about the. girls moving the sack bag

1.	Which of the following is correct about the. girls moving the sack bags as shown in the above diagram? 1. Girl a has to work more against friction. 2. Girl b does not Slave to work against friction. 3. The wheels of the trolley have reduced the friction.
A.	1 only
B.	3 only
C.	Electrostatic force
D.	2 and 3 only
Answer» D. 2 and 3 only