Question

plz answer (ii) it is urgent ​

Answer 1

(i) light rifle

(ii) because the water exerts fore on fireman backwards. this is like recoil of rifle when firing bullet

Answer 2

Explanation:

for light rifle, recoil velocity will be large due to small mass thus light rifle will hurt more

the fireman will have problem because the water is coming out from a small source at a very high speed thus there is high recoil