A circular loop of wire of radius 18 cm moves at a speed of 6.3 m/s in the direction of a 0.16 T uniform magnetic field, perpend
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Answer:
5.62 m/s
Explanation:
Newton's law of motion can be used to determine the maximum speed of the elevator. In the question, we are given:
Force exerted by the elevator (R) = 1.7 times the weight of the passenger (m*g)
Thus: R = 1.7*m*g
Distance (s) = 2.3 m
Newton's second law of motion: R - m*g = m*a
1.7*m*g - m*g = m*a
a = 0.7*m*g/m = 0.7*g = 0.7*9.8 = 6.86 m/s²
To determine the maximum speed:
Therefore, the elevator maximum speed is equivalent to 5.62 m/s.
The approximate total distance Earth has traveled since its birth is 3.8×10²¹m.
The Earth moves in a circular orbit of radius <em>r</em> around the Sun and it takes 1 year to go once around the Sun. Thus in a year it travels a distance equal to <em>2πr, </em>which is the circumference of the Earth's orbit.
Therefore in <em>n</em> years that have elapsed, it would travel a distance <em>d</em> given by,
Substitute 3.14 for <em>π, </em>1.5×10¹¹m for <em>r</em> and 4×10⁹ for n.
Thus, the approximate total distance Earth has traveled since its birth is 3.8×10²¹m.