The expression for gravitational potential energy is “-(G*M)/r”. a) True b) False
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The expression for gravitational potential energy is “-(G*M)/r”.
a) True
b) False
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- 18. What is the gravitational potential energy of a 70 kg person standing on the roof of a 12-story building relative to (a) the tenth floor, (b) the sixth floor, (c) the first floor? (Each story is 2.80 m high.)Problem 2: A certain spring has a spring constant k₁ = 660 N/m as the spring is stretched from x = 0 to x1 = 35 cm. The spring constant then changes to k₂ = 250 N/m as the spring is stretched to x2= 65 cm. From x₂= 65 cm to x3 = 89 cm the spring force is constant at F3 = 105 N."Energy per unit time" is a quantity called Power. Which of the following combinations has the same units as power? A length squared times mass over time squared B persimmons. C speed times mass times acceleration over time D Force times acceleration E {potential energy minus kinetic energy} times time F Force times velocity G speed squared times mass H mass time acceleration I mass squared times acceleration.
- A hiker of mass 73 kg is going to climb to the top of Mount Tam, which has an elevation of 2,574 ft. a) If the hiker starts climbing at an elevation of 545 ft, what will their change in gravitational potential energy be, in joules, once they reach the top? Assume the zero of gravitational potential energy is at sea level. b) Repeat the above calculation for the change in gravitational potential energy, but assume the gravitational potential is zero at the top of the mountain.How much energy AE would be required to move the Moon from its present orbit around Earth to a location that is twice as far away? Assume the Moon's orbit around Earth is nearly circular and has a radius of 3.84 × 10° m. ΔΕ= J