What is the magnitude of the electric force between two point charges with q1 = -1.5 c and q2 = 0.8 c at a distance of 1 km?

Free runners jump long distances and land on the ground or a wall. how do they apply newton’s second law to lessen the force of impact?

When considering gravity acceleration and the force of acceleration, what must be true? a. the direction of acceleration must be perpendicular to the direction of the force. b. the direction of the force and the direction of acceleration must be the same as each other. c. the direction of the force and the direction of acceleration must be opposite of each other. d. the mass of the body must be the same as the acceleration of the body.

Ineed the answer to question 1 , i’m desperate