The total kinetic energy of the system is 2.5J
Answer:
d) F
Explanation:
According to columb's law:
"The magnitude of electrostatic force between two charges is directly proportional to the product of magnitude of two charges and inversly proportional to separation between them."
If q₁ and q₂ are magnitude of two charges, d is distance between them and k is dielectric constant, then force F is given by

According to this force exerted on point charge Q is same as that of 3Q, so force point 3Q charge experience is also F
Explanation:
When spring is used to shoot an arrow, the Elastic Potential Energy is converted into Kinetic Energy.
The efficiency of Spring Toy = 69%
<u>According to Conservation of Energy</u> :
P. E. = K. E.
NOW,
69% of P. E. = m * v^2 / 2

<span>The screw gauge doesn’t have a zero error when the zero of the main scale coincides with the zero of the vernier scale or circular scale.
In case they don’t coincide then the instrument screw gauge is said to have a zero error which can be positive zero error or a negative zero error. In order to get an exact measurement, the error is added or subtracted from the value measured.</span>
Jupiter because it’s the biggest and largest.