Question

1. Two particles of masses 1g and 2g have equal momentum. Find the ratio between their kinetic energies? 2. What will be the work done by the string, when a stone is tied to a string and whirled in a circle? 3. A locomotive exerts a force of 7500N and pulls a train through 1.5 km. How much work is done by locomotive?

Answer 1

Hope this helps u...

Answer 2

1)ratio = 2:1


2) work done is 0 since displacement in circles is zero
3) F= 7500N
d= 1500m
Work done = F× d= 7500× 1500
W= 1125× 10⁴ J