A 50 lb object is subjected to an applied upward force of 30 lbf. The only other force acting on the object is the force of gravity. The acceleration of gravity is 32.2 ft/s². Determine the weight of the object, in lbf, and the net acceleration of the object, in ft/s².

A 50 lb object is subjected to an applied upward force of 10 lbf. The only other force acting on the object is the force of gravity. The acceleration of gravity is 32.2 ft/s². * Your answer is incorrect. Determine the net acceleration of the object, in ft/s², with positive values being upward. 32.2 ft/s² a =

An electric boiler generates 100,000 Btus of heat. Roughly, what is the electrical input of the boiler (in other words, the electrical energy to produce the output), in kilo-watts?

A force of 7 pounds is required to hold a spring stretched 0.6 feet beyond its natural length. How much work (in foot-pounds) is done in stretching the spring from its natural length to 1.1 feet beyond its natural length?