I would say B. Because actual mass would ricochet off the sidewalk.
The process of burning fuel is Combustion
Answer:

Explanation:
Since the object is under a circular motion, according to Newton's second law, when the object is at the top of the circle we have:

Where
is the centripetal force and is given by:

Replacing and solving for T:

a wedge is a small inclined plane
a screw is an inclined lane wkich goes round a centrral axis ... like a 'spiral' or helical staircase
easier per step ... more steps