A man walks 7km East, and then 7 km West. What is the total distance the man walked? What is the displacement

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up

Two cannon balls weighing 18 kg and 24 kg are chained together and fired horizontally with a velocity of 165 m/s from the top of a 21-m wall. the chain breaks during the flight of the cannonballs and the 18-kg cannonball strikes the ground at t = 1.5 s, at a distance of 240 m from the foot of the wall, and 7 m to the right of the line of fire. determine the position of the other cannonball at that instant. neglect the resistance of the air.

When you hold a rectangular object, how does the area of the side that is resting on your hand affect the pressure and the force that the object exerts?