The net forward force on the propeller of a 3.2 kg model airplane is 7.2 in. what is the acceleration of the airplane

What is the measure of how much matter is in an object and that can be measured using a balance? a. height b. volume c. weight d. mass

1) what is the power in horsepower of a 100 watt light bulb? what is the power in kilowatts of a 200 horsepower engine? 2) if a cars engine is providing 3000 n of force to keep the car moving at 5 m/s, what is the engine’s effective power? 3) how many gallons of water will be pumped from a well 30 feet deep by a 1/2 hp engine in 1 minute? (1 gallon weighs 8.34 pounds)

How to know which equation of motion to use where?explain