Suppose you are pushing a 3 kg box with a force of 25 N (directed parallel to the ground) over a distance of 15 m. Afterward, the box (initially at rest) is traveling at a speed of 6 m/s. How much work (in Joules) did friction do in this process

321 J

Explanation:

Given

Mass of the box

Force applied is

Displacement of the box is

Velocity acquired by the box is

acceleration associated with it is

Work done by force is

change in kinetic energy is

According to work-energy theorem, work done by all the forces is equal to the change in the kinetic energy

Therefore, the magnitude of work done by friction is

radial fractures in a piece of glass look most like which of the following?

a. spokes of a wheel

b. a circle

c. a zig zag

d. none of the above

the correct answer is a. spokes of a wheel

hope this (: