The centripetal acceleration of an object is given by the relation,
where Ac = centripetal acceleration =
R = radius of rotation = 15 m
V = speed of astronaut
Hence,
solving this we get, V = 38.34 m/s
The total distance covered by the person is 12 times the height of each stair:
The work done by the person to climb the stairs is equal to the increase in his gravitational potential energy:
And therefore, the power generated by the person in 12 s is the work done divided by the time taken:
So, the correct answer is B.
No.
East-force can only be balanced by west-force.
North-force has no west-force in it, no matter how strong it is.
Answer:
True
Explanation:
Because that's what the law of inertia does
To make the motor turn faster we can:
(a) increase the current
(b) use stronger magnets
(c) push the magnets closer to the coil
(d) put an iron centre piece into the coil
(e) adding more sets of coils