Answer:
0
Explanation:
The bicyclist is not speeding up or slowing down so there is no acceleration.
Answer:
595.73 X 10⁻⁶ V.
Explanation:
The magnetic field is towards the north with dip angle equal to 65 so the horizontal component of earth's magnetic field will be
H = 50 X 10⁻⁶ Cos 65 = 21.13 x 10⁻⁶ T.
length of rod L = 1.45 M
Velocity of rod = 70 km / h = 19.444 m /s
Since the top of the antenna rod is to have positive polarity , current induced in it will be from down to up . Magnetic field is towards the north .
To cut magnetic flux perpendicularly , rod should move towards the east .
We can easily get this direction by applying Fleming's right hand Rule.
Induced emf = H L v
= 21.13 x 10⁻⁶ X 1.45 X 19.444
= 595.73 X 10⁻⁶ V.
Answer:
1.97 m/s
Explanation:
The initial angular velocity of the blades is:
The final angular velocity is
(since the blades come to a stop)
and the time taken is
t = 30 s
So, the angular acceleration of the blades is
Now we can find the angular velocity of a blade after a time t=10 s:
The distance of the tip of a blade from the centre is equal to half the diameter, so
so, the speed of the tip of a blade is
Answer: when an object begins to fall its potential energy decreases and it’s kinetic energy increases, potential energy is equal to kinetic energy because a decrease in potential energy is exactly equal to the increase in kinetic energy.