Answer:
See description
Explanation:
Frist we need to know the longitude of tape which is unwinding. Such relationship can be obtained with arc length. An arc length is the distance bewteen two points in a curve.
The relationship is:
Where is the arc length or distance, theta is the angle that results from the initial point of the measure to the final point, and r is the radius of a circumference.
Now let be length the unwinded tape. Change by and you ge the relationship:
if you unwind the tape by one revolution () you get the perimeter of a cricle , if you unwind it two times then and so on.
Then we have that the derivative of is
so we replace:
the derivative of theta with respect to t is ω(t) by definition:
The result is the relationship between angular velocity and the velocity and tangential velocity at the point r
Hello!! the answer should be C... I agree with the first person! I am taking this test too
Fnet = ma
4 N = 5 kg * a
a = 4 N/5 kg
a = 0.8 ms^-2
Pipettors, microcentrifuge, timers, mixers, a water bath. And those should only be used for radioactive materials (sorry if this is wrong it’s my best knowledge for this stuff :/)