A plane traveled west for 4.0 hours and covered a distance of 4,400 kilometers. What was its velocity? 18,000 km/hr 1,800 km/hr,
2 answers:
Answer: The correct answer is 1,100 km/hour.
Explanation:
Displacement of the plane = 4,400 km
Time taken by the plane = 4.0 hour
Since, Velocity is a vector quantity which means it has direction with magnitude. So, the velocity of the plane is 1,100 km /hour west.
Hence, the correct answer is 1,100 km/hour.
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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.
Answer:
(a) Magnetic moment will be
(b) Torque will be
Explanation:
We have given dimension of the rectangular 5.4 cm × 8.5 cm
So area of the rectangular coil
Current is given as
Number of turns N = 25
(A) We know that magnetic moment is given by
(b) Magnetic field is given as B = 0.350 T
We know that torque is given by