The velocity of a car changes from 5 m/s to 20 m/s in 30 sec the acceleration?

Use the right-hand rule for magnetic force to determine the charge on the moving particle. this is a charge.

Water is siphoned from a large tank and discharges into the atmosphere through a 50-mm diameter tube. the end of the tube is b = 2.1 m below the tank bottom which is a = 7.4 m deep, and viscous effects are negligible. determine the maximum height h over which the water can be siphoned without cavitation occurring. atmospheric pressure is 101.4 kpa, and the water vapor pressure is 1.79 kpa (absolute)

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