A car weighs 3000 kg. Three people P, Q and R are pushing it with an average force of 450 N to move it out from the mud. One more person S joins them and now they all can move the car from the mud. Find out the force applied by S if the required average force was 800 N.
1
4550
2
3050
3
1850
4
800
5
None of these.