Which of the following graphs could represent the kinetic energy of the mass as a function of time for one period after it is released from rest? Choose 1 answer: KE 0 T 2 KE И M •M M T 2 KE 0 T 2 T 2 A B K KE T T T T
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- How fast must a 2.5-g ping-pong ball move in order to have the same kinetic energy as a 145 g baseball moving at 33.0 m/s?How much work is required to stop an electron (m=9.11×10−31kg)(m=9.11×10−31kg) which is moving with a speed of 1.80×106 m/sm/s ?A person is 170 cm tall. He holds a 10 kg object on his head for 10 minutes. How much work is done on the object?
- An object with a mass of m = 2.25 kg is traveling with an initial velocity of v, = (5.40î – 1.40j) m/s. (a) Determine its initial kinetic energy. (Give your answer to at least one decimal place.) (b) Determine the amount of work that must be done on the object in order to change its velocity to v; = (7.00oî + 7.00j) m/s.please help with questions 32,33 and 34Suppose that a spacecraft of mass 6.9 x 104 kg at rest in space fires its rockets to achieve a speed of 5.2 x 103 m/s. How much work has the fuel done on the spacecraft?
- An object of mass m = 3 kg moves in the x direction with the potential energy U (x) shown. There are no other forces acting. On the axes provided below the graph of U (x), sketch the force F(x) that the mass experiences. If the object is released from rest at x = -2 where U = 16J, what is its velocity at x = O where U = -8J? %3D U(x) (J) |16 х (m) F(x) (N) х (m)A book on a 3 meter high shelf has 17 joules of potential energy.what is the mass of the book 30kg .58kg 100kg 50kgAn object with mass 3 kg is moving with a speed of 5 m/s at a height of 2.5 m above the ground. Using the ground as the zero Potential Energy point, what is the total mechanical energy of the particle?