Question

pls answer it
its very urgent

question no. 5 pls answer it

Answer 1

ans is 40j
mass if block- 2 kg
d-40m
acc-0.5ms^-2
work done - F×S
Force- m×a
=2×0.5
=1N
work done=1×40
=40J

Answer 2

hope this helps uh.........