Question

9.
A person pushes a block of mass 0.25 kg along
a horizontal table with a force of magnitude 5 N for
a distance of 0.5 m. The frictional force between
block and table is 1 N. The average power of
pushing force is
(1) 20 W
(2) 10 W
(3) 40 W
(4) 0.5 W​

Answer 1

Answer:

Step-by-step explanation:

A person pushing a box having the weight of 0.25 kg.

he covers a distance of 0.5m

the frictional force between table and block is of 1N

1N consist of 10W

then 5N-1N

=4N

means the average force is of 40W

option no 3