Answer:
The final velocity of 18 kg ball is = 42.09
Explanation:
Mass of first ball = 18 kg
Mass of second ball = 47 kg
Initial velocity of 18 kg ball = 76
Initial velocity of 47 kg ball = 0
Final velocity of 18 kg ball = ??
Final velocity of 18 kg ball is given by the formula
=
Put all the values in above formula we get
= 2 × 18 ×
= 42.09
Thus, the final velocity of 18 kg ball is = 42.09
fyt as per the question the magnitude of two like charges are given as q1 and q2.the separation distance is given as r unit.hence the potential energy is given as-
here the potential energy is positive which means the force between two charges is repulsive.the potential energy is maximum which indirectly denotes that the system is unstable.due to this repulsion the smaller charge may accelerate.
coming to the same charges of opposite nature i.e unlike charges-here the magnitude of charges are same and separation distance is also are,so the potential energy will be given as-
here the potential energy is negative .so the system of two charges are attracted by each other.