Potential energy at any point is (M G H). On the way down, only H changes. So halfway down, half of the potential energy remains, and the other half has turned to kinetic energy. Half of the (M G H) it had at the tpp is (0.5 x 9.8 x 10) = 49 joules.
Answer:
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Answer:
a.Electric force exerted on one charged sphere, by another charged sphere.
Explanation:
Coulomb's Law describes the electric force between two objects. It is given by the following formula:
The magnetic field surrounding a current carrying conductor is described by Ampere's Law.
Amount of heat generated by a high current flow in a resistor can be described by P = VI
Voltage induced in a coil by a constant magnetic field is described by Faraday's Law.
It accelerates from rest at 1.1 m/s^2 for 20s.
<span>s = at^2/2 </span>
<span>s = (.5)(1.1)(20)^2= 220m </span>
<span>then it travels 1100m </span>
<span>Then it slows down at 2.2m/s^2 until it stops at the station. </span>
<span>Calculate the train's speed: </span>
<span>v = at </span>
<span>v = (1.1)(20) = 22m/s
</span>
<span>Now, calculate the time to stop: </span>
<span>v = at </span>
<span>t = 22/2.2 = 10s </span>
<span>s = t(u+v)/2 </span>
<span>s = 10(0+22)/2 = 110m </span>
<span>(A) Total distance = 220 +1100+110 = 1430m </span>
<span>(B) Time = 20 + 1100/22 + 10 = 80s</span>
