ass of 0.20 kg. If it is 2.8 meters above the ground, how much potential energy does it have?  Round to the nearest whole

A 0.27-kg stone is held 1.2 m above the top edge of a water well and then dropped into it. The well has a depth of 5.6 m.   (a) Taking y = 0 at the top edge of the well, what is the gravitational potential energy of the stone–Earth system before the stone is released? (b) Taking y = 0 at the top edge of the well, what is the gravitational potential energy of the stone–Earth system when it reaches the bottom of the well? (c) What is the change in gravitational potential energy of the system from release to reaching the bottom of the well?

An object of mass 2.0 kg has a velocity of (î 7 + j2 ) m/s. A force acts upon it and does 22 Nm of work on it. What is its final speed?

You go for a walk one afternoon down a level street to a park where there is a hill.  If the hill is 62 meters above street level and 4.6 km  from home , how much work in the physics sense do you do in order to get to the top of the hill?  Assume your mass is 65 kg and the acceleration of gravity is 9.8 m/s. Give your answer in joules (J).

In the figure, a frictionless roller coaster car of mass m = 729 kg tops the first hill with speed vo = 24.0 m/s at height h = 36.6 m. How much work does the gravitational force do on the car from that point to (a) point A, (b) point B, and (c) point C? If the gravitational potential energy of the car-Earth system is taken to be zero at C, what is its value when the car is at (d) B and (e) A? First hill- B h/2 (a) Number i Units (b) Number i Units (c) Number i Units (d) Number i Units (e) Number i Units

1. A jeep with mass of 2000 kg is going 18 m/s at the bottom of a hill that is 50.0m high. When it reaches the top, it is travelling at 10m/s. (a) what is the total work done by all forces (the jeep engine, the mud, gravity, etc) as it ascends the hill? (b) What is the minimum work required by engine of the jeep if only the engine and gravity are doing work (if there is na friction, forces from mud, etc)?

Two 37.0-lbm twins are playing in their backyard. One toddler is running full speed at 5.5 mph and his path will take him directly into a brick wall. His sister has climbed a 3.5-ft ladder and is perched precariously atop it. Calculate the kinetic and potential energies of the two twins with respect to their stationary destinations (the wall and the ground). Boy Girl i KE (lbf.ft) PE (lbf.ft) If potential energy is completely converted to kinetic energy during the girl's fall, how fast will she be travelling upon impact? mph

On a playground slide, a child has potential energy PE = 450.0 J at the top of the slide. Thechild’s mass is 25.0 kg. (For simplicity, take the value of g to be 10.0 m/s2 in this problem.) When the child slides down to the bottom of the slide, her KE = 300.0 J. a) What was the height of the slide?b) How much was the work done by friction?c) How fast was the child moving when she reached the middle of the slide? (Assume that thework done by friction is half of what you get in (b). Note that the PE2 is not zero this time.)

A cable car with a mass of 5200-kg in Los Angeles (CA) is pulled a distance of 360 m along a cable up a hill inclined at 12° from the horizontal. The change in the potential energy of the car is 3.8 x10^6 3.9 x10^5 1.8 x10^7 O2.3 x10^7

1 Name: I I. A person's heart and head are 1.3 m and 1.8 m above the feet, repectively. Determine the potential energy of 0.5 kg of blood in the heart relative to (a) the feet, (b) the head. 1 I I I I I | I I I I I I