What is the main action and reaction forces at work when a person leans against a car? * 3 points a. the person pushes against the car and the car pushes back b. the person is pushed away and the car stays still. c. the person pushes against the car and the car pulls the person back on it. d. the car pushes the person.

Describe uniform velocity and variable velocity in short

Positive ions differ from neutral atoms in that

Aball is thrown from the top of a building with an initial velocity of 21.9 m/s straight upward, at an initial height of 51.6 m above the ground. the ball just misses the edge of the roof on its way down, as shown in the figure. (a) determine the time needed for the ball to reach its maximum height. (b) determine the maximum height. (c) determine the time needed for the ball to return to the height from which it was thrown, and the velocity of the ball at that instant. (d) determine the time needed for the ball to reach the ground. (e) determine the velocity and position of the ball at t = 5.35 s.