Displacement is the straight-line distance and direction from start-point to end-point, regardless of the actual path taken.
In this example, that's 10.3 km (rounded) in the direction 14 degrees west of South.
When the ruler is broughı near the inetal knob, it repels electrons in the metal. Electrons move away froni the ruler and down the metal rod. The knob now has a positive charge. The thin pieces of metal foil at the bottom of the metal rod now have a negative charge.
Answer:
![5.32\times 10^{-16} m](https://tex.z-dn.net/?f=5.32%5Ctimes%2010%5E%7B-16%7D%20m)
Explanation:
hence making time the subject then
![Time=\frac {Distance}{Speed}](https://tex.z-dn.net/?f=Time%3D%5Cfrac%20%7BDistance%7D%7BSpeed%7D)
Substituting 50 cm which is equivalent to 0.5 m for distance and velocity as given as
we obtain
![Time=\frac {0.5}{4.8*10^{7}}=1.04167\times 10^{-8} s](https://tex.z-dn.net/?f=Time%3D%5Cfrac%20%7B0.5%7D%7B4.8%2A10%5E%7B7%7D%7D%3D1.04167%5Ctimes%2010%5E%7B-8%7D%20s)
From kinematic equation
and taking g as 9.81 then
![s=(0*1.04167\times 10^{-8} s)+(0.5*9.81*(1.04167\times 10^{-8} s)^{2})=5.32227\times 10^{-16} m](https://tex.z-dn.net/?f=s%3D%280%2A1.04167%5Ctimes%2010%5E%7B-8%7D%20s%29%2B%280.5%2A9.81%2A%281.04167%5Ctimes%2010%5E%7B-8%7D%20s%29%5E%7B2%7D%29%3D5.32227%5Ctimes%2010%5E%7B-16%7D%20m)
![s\approx 5.32\times 10^{-16} m](https://tex.z-dn.net/?f=s%5Capprox%205.32%5Ctimes%2010%5E%7B-16%7D%20m)
It states that energy neither be created nor be destroyed.energy may only be transform from one form to another. example mechanical energy= ek + ep