1) A box of 20 kg mass is pulled by force F with constant velocity on a horizontal surface. If force of friction is 49N, work done during displacement of 10m is ________ J.
(a) 490
(b) 245
(c) 980
(d) zero
W=Fxs
W= change in kinetic energy
W=0 (constant velocity)
Which equation will be...
Hello,
I would like to know that why carbon is used in nano technology to build nano tubes and other? Is there any other metal which is used to construct the devices of nano technology?