Abasketball rolls off a deck that is 3.2 m from the pavement. the basketball lands 0.75 m from the edge of the deck. how fast was the basketball rolling? seema lists the given values in a chart and determines that the unknown value is vx. which describes seema’s error? the y and x values are switched. the unknown is , not vx. the value for ay is not known. the value of y should be –3.2 m.

here we know that ball will drop down by total distance 3.2 m

so here we know that

now using kinematics

now in the same time it will cover horizontal distance of 0.75 m

so speed of the ball will be

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .

beta is electron from nucleus

something from nucleus has changed, but charge must be same for cons of charge