Work = (force) x (distance)
The worker does (40N) x (4m) = 160 joules of work.
Friction eats up (27N) x (4m) = 108 joules of that energy,
generating 108 joules of heat.
The remaining (160J - 108J) = 52 joules of energy moves the box.
Answer:
Explanation:
The combined speed after collision can be determined by means of the Principle of the Energy Conservation:
The magnitud of the momentum of the combined mass immediately after the collision:
Answer:
there is an infinite number of images because it is reflected off of the mirrors. the images in the mirror will "move" if either mirror is shifted because the angle of reflection. the images are the same because its just a repeated reflection. i see the object on both sides, repeated as far as i can see in both mirrors.
Explanation:
Answer:
Explanation:
<u>First person:</u>
the rock is dropped
after t1 seconds it hit the ground, y(t)=0
<u>Second person:</u>
the rock has a initial downward speed
after t2 seconds it hit the ground, y(t)=0
the time t when the second person throws the rock after the first person release the rock is:
t=t1-t2