Answer:
it is separated by 80 cm distance
Explanation:
As per Coulombs law we know that force between two point charges is given by

here we know that


force between two charges is given as

now we have



so it is separated by 80 cm distance
A roller coaster car starts from the rest from a first summit, descends a vertical distance of 45 meters and then climbs a second summit, reaching the top with a speed of 15m / s. How high is the second summit? Do not consider friction
So the heavy skateboarder will move off with speed 2.45 m/s in the opposite direction
Answer:
Explanation:the time taken to stop is 7seconds
The distance traveled by the car as it breaks is 63m