A 5.34 kg ball is thrown upward with an initial speed of 13.77 m/s. Ignore air resistance when answering the following questions. What is the ball's initial kinetic energy?  What is the ball's kinetic energy when it reaches its maximum height?  What is the ball's gravitational potential energy (relative to Earth's surface) when it reaches its maximum height?  What is the ball's maximum height?  What is the ball's kinetic energy just before it returns to your hand?

Calculate Kinetic Energy, Potential Energy, Rest Energy and Work using the following information. Force = 500,000 cN %3D Mass = 200,000 g Speed (velocity) = 5 m/s %D Height = 1500 mm %3D Distance = 3 miles (1 mile = 1.6 km) %3D %3D We also know that acceleration of gravity, g = 10 m/s^2 and %3D speed of light, c = 3 x 10^8 m/s. First do all necessary unit changes for all the above quantities and then show all work to calculate Work, KE, PE and RE. BIU A Paragraph + v II II II II II II II II II II II II II II II II II II II II lili II II II II II II II II

1. A roller-coaster car with a mass of 1200 kg starts at rest from a point 20 m above the ground. At point B, it is 9 m above the ground. [Express your answers in kilojoules (kJ).] a. What is the initial potential energy of the car? b. What is the potential energy at point B? c. If the initial kinetic energy was zero and the work done against friction between the starting point and point B is 40 000 J (40 kJ), what is the kinetic energy of the car at point B 2. The time required for one complete cycle of a mass oscillating at the end of a spring is 0.80 s. What is the frequency of oscillation?

A woman runs up a flight of stairs. The gain in her gravitational potential energy is 1000 J. If she runs up the same stairs at half the speed, her gain in gravitational potential energy will be . . .  Group of answer choices 500 J 2000 J 100 J 1000 J

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

A 3 kg ball falls from height of 14 m. What willbe potential energy of the ball after 1 second?  Use g = 9.8 m/s2

A 0.2 kg ball is resting on edge of the top of a 1 m height table. Does the ball have kinetic energy? Explain. Does the ball have potential energy? What is the value of its potential energy? If the ball falls off the table, what happens to its potential energy and kinetic energy during this falling? Which increases/decreases?

Q 3. Three cars are traveling at 30km/h, 50km/h and 200km/h, respectively. Each speed corresponds to a certain kinetic energy. a)  Note down the expression for the kinetic energy of a moving object with a velocity v. b)  Note down the potential energy for an object lifted up from the ground to height h. c)  Based on a) and b) find an expression for the height as a function of velocity by assuming that the kinetic energy equals the potential energy of the same object. In other words find h(v) from which the object would need to be dropped and calculate the height so it has a speed of 30 km/h, 50 km/h or 200 km/h on impact with the ground. Assume free fall without air resistance d)  Comment on your chances of survival if you are involved in head-on collisions for the three different speeds.

An athlete throws a 1.5 kg ball with a horizontal speed of 9 m/s, from a height of 4.8 metres above the ground.  a) Calculate the kinetic energy, gravitational potential energy and total mechanical energy of the ball at its starting position. b) Calculate the maximum speed attained by the ball, just as it reaches the ground's surface.