Question

14. When a horizontal force F is applied on
a block of mass 10 kg kept at a
horizontal surface, it is found that the
block moves with constant speed. If the
coefficient of sliding friction = 0.5. The
work done in moving the block through
a distance 5 m is
(a) 245 J
(b) 255 J
(c) 270 J
(d) 280 J​

Answer 1

b) 255j

distance =25.5

use work =mass×distance

=10×25.5

=255j