Question

19. A body of mass 2 kg is being dragged with uniform velocity of 2 m/s on a rough horizontal plane. The amount of
heat generated in 5 sec is (ul, = .18, Il = 2, J = 4.2 joule/cal and g = 9.8 m/s)
(a) 9.33 cal
(b) 15.21 cal
(c) 12.67 cal
(d) 13.34 cal​

Answer 1

Answer:

answer is option b..........

Answer 2

9.33 cal

Explanation:

x=vt

x=10

f=mu*N*x

f=0.2*2*9.8*10

f= 39.2J

4.2J = 1 calorie

39.2J = 9.33 cal