Question 12 A beaker of water equivalent 20 gram contains 80

Last updated: 6/8/2023

Question 12 A beaker of water equivalent 20 gram contains 80 gm water specific heat capacity of water is 4200 J kg K and is placed on a conveyor belt The conveyor belt is moving with speed 5 m s The beaker is connected to an inextensible horizontal string and the other g 10m s end of which is fixed String 5m s The temperature of the beaker and the water is found to increase by 1 K in 2 minutes If 20 of the thermal energy produced is absorbed by water plus beaker system the friction force acting between the beaker and the belt is assuming that there is no heat loss from water and beaker to the surrounding Options a 3 5 N b 7 N c zero