A disk is spinning about its center with a constant angular speed at first. Let the turntable spin faster and faster, with const
ant angular acceleration ?. Which sketch qualitatively shows the direction of the acceleration vector a of the bug?
1 answer:
Answer:
4 (please see the attached file)
Explanation:
While the angular speed (counterclockwise) remained constant, the angular acceleration was just zero.
So, the only force acting on the bug (parallel to the surface) was the centripetal force, producing a centripetal acceleration directed towards the center of the disk.
When the turntable started to spin faster and faster, this caused a change in the angular speed, represented by the appearance of an angular acceleration α.
This acceleration is related with the tangential acceleration, by this expression:
at = α*r
This acceleration, tangent to the disk (aiming in the same direction of the movement, which is counterclockwise, as showed in the pictures) adds vectorially with the centripetal force, giving a resultant like the one showed in the sketch Nº 4.
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j = 3.73i+4.70j
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a) So sum of the vector = 1.274i+0.6j
b) Magnitude =
c) Angle,
Answer:
Speed of 1.83 m/s and 6.83 m/s
Explanation:
From the principle of conservation of momentum
where m is the mass,
is the initial speed before impact,
and
are velocity of the impacting object after collision and velocity after impact of the originally constant object
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After collision, kinetic energy doubles hence
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Also, it’s known that hence
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Therefore, the blocks move at a speed of 1.83 m/s and 6.83 m/s
Answer:
Part a)
Part b)
Explanation:
Part a)
Electric field due to large sheet is given as
now the electric field is given as
Part b)
Now since the electric field is required at same distance on other side
so the field will remain same on other side of the plate