turner’s treadmill starts with a velocity of
−2.7 m/s and speeds up at regular intervals
during a half-hour workout. after 33 min, the
treadmill has a velocity of −7.1 m/s.
what is the average acceleration of the
treadmill during this period?
answer in units of m/s

By definition, we have to:

Where,

vf: final speed

vo: initial speed

t: time

a: acceleration

Clearing the acceleration we have:

When replacing values we have to take into account two things:

1) Assume that the given speeds are positive

2) The time must be in seconds

The time in seconds is:

Then, replacing values we have:

The average acceleration of the treadmill during this period is:

! 55 !  

write a paragraph or story to explain the transformation between potential and kinetic energy as shown in your picture or model.  

you should have at least 5 complete sentences with a main idea and supporting details.  

you must include the following words:  

potential energy

kinetic energy

mechanical energy

conservation of energy

dude, this is hard lol : ))

0.3x0.21x0.08kg=mass 1 sheet

mass 500 = 500xmass 1

volume pile = 0.3x0.2x0.048

density=mass/volume= 500xmass 1/0.3x0.2x0.048

v patient student