An object whose mass is 90 lb is projected straight upward from the surface of the earth and reaches a height of 900 ft when its velocity reaches zero. The only force acting on the object is the force of gravity. The acceleration of gravity is g = 32.2 ft/s². Determine the initial kinetic energy of the object, in ft·lbf, and the initial velocity of the object, in ft/s.

A nonflow system has a mass of 5 lb. in it. The system undergoes a process during which 200 ft.lbf of heat is transferred to the surroundings. If the system does 1000 ft.·lbf of work on the surroundings, determine the change in specific internal energy of the fluid in lbf/lbm.

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 =

The mass of a baseball is 0.833 lb. Determine its kinetic energy relative to home plate of a 95.58 mile per hour fastball, in BTU.

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.

The mass of a baseball is 1.331 lb. Determine its kinetic energy relative to home plate of a 95.27 mile per hour fastball, in BTU.

(a) During the packaging process, a can of soda of mass 0.4 kg moves down a surface inclined 20° relative to the horizontal, as shown in the figure below. The can is acted upon by a constant force R. parallel to the incline and by the force of gravity. The magnitude of the constant force R is 0.05 N. Ignoring friction between the can and the inclined surface, determine the can's change in kinetic energy, in J, and whether it is increasing or decreasing. If friction between the can and the inclined surface were significant, what effect would that have on the value of the change in kinetic energy? Let g = 9.8 m/s² Final location Soda 20° m=0.4 kg- 1.5 m ↓ Initial location Soda R = 0.05 N Soda

A fluid flowing in a pipe 1000 ft above the reference line at a pressure of 200 psia, specific volume of 2 ft3 /lb, velocity of 200 ft/sec and internal energy of 100 Btu/lbm. Determine (a) the total energy of the flowing fluid with respect to the reference line and (b) the specific enthalpy in Btu/lbm . Local gravity is 32 ft/sec2 .

An object whose mass is 90 lb is projected straight upward from the surface of the earth and reaches a height of 900 ft when its velocity reaches zero. The only force acting on the object is the force of gravity. The acceleration of gravity is g = 32.2 ft/s?. Determine the initial kinetic energy of the object, in ft-lbf, and the initial velocity of the object, in ft/s.

What is the mass of an object that falls freely under the influence of gravity from an elevation of 100 m above the earth's surface? The downward velocity is 100 m/s and strikes the earth at 109.4m/s. Take g = 9.81 m/s2.