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A particle starting from rest revolves with uniformly increasing speed in a clockwise circle in the zy plane. The center of the circle is at the origin of an xy coordinate system. Att=0 the particle is at x=0.0,y=2.9mcdot Att=1.0s it has made one. quarter of a revolution and is at x=y_(0),y=0.0 Part A Determine its speed at 1.0 s Express your answer to two significant figures and include e the appropriate units. ? m v=3.35 square Submit Previous Answers Request Answer Incorrect; Try Ağain;4 attempts remaining
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Elit · 8 yıl öğretmeni
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Cevap
To determine the speed of the particle at 1.0 s, we need to use the relationship between velocity and angular displacement in circular motion.Given:- The particle starts from rest, so its initial velocity
.- At
, the particle is at \( (x_0, y_0) = (0, 2.9 \, \text{m}) \).- At
, the particle is at \( (x, y) = (y_0, 0) \).Since the particle makes one-quarter of a revolution in 1.0 s, the angular displacement
is
or
radians.The relationship between linear velocity
, angular velocity
, and radius
is:
The angular velocity
can be found using the formula:
Here,
radians and
:
The radius
of the circle is the distance from the origin to the initial position of the particle:
Now, we can find the speed
:
Therefore, the speed of the particle at 1.0 s is approximately
.