Kid is playing with toy cars and gives the 2 kg red toy car velocity of 8 m/s to the right. Later he puts 1 kg barbie on the car very carefully.
a. What will be the velocity of the red car and the barbie together after he puts
barbie on the car?
b. If he takes away the barbie, what will be the velocity of the car now?

Current enters a circuit at a: 1.positive terminal 2.negative terminal 3.low potential side 4.resistor

Alarge cruise ship of mass 7.00 ✕ 107 kg has a speed of 11.6 m/s at some instant. (a) what is the ship's kinetic energy at this time? (b) how much work is required to stop it? (give the work done on the ship. include the sign of the value in your answer.) (c) what is the magnitude of the constant force required to stop it as it undergoes a displacement of 3.00 km?

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 = 2.6 m below the tank bottom which is a = 6.7 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). report your answer in meters to two decimal places.