Consider a situation where you carry a 20-N box up a flight of stairs, raising its elevation by 5 m.After the dropped box hits the floor, its kinetic energy is
a. 0.
b. equal to its potential energy.
c. is converted to internal energy.
d. none of the above.
a, c
You might also like to view...
How does a black hole form from a massive star?
A) During a supernova, if a star is massive enough for its gravity to overcome neutron degeneracy of the core, the core will be compressed until it becomes a black hole. B) Any star that is more massive than 8 solar masses will undergo a supernova explosion and leave behind a black-hole remnant. C) If enough mass is accreted by a white dwarf star so that it exceeds the 1.4-solar-mass limit, it will undergo a supernova explosion and leave behind a black-hole remnant. D) If enough mass is accreted by a neutron star, it will undergo a supernova explosion and leave behind a black-hole remnant. E) A black hole forms when two massive main-sequence stars collide.
In the very first phase after the big bang, when the Universe was about a microsecond old, space was filled with____
a. high-energy photons b. protons and antiprotons c. protons, neutrons, electrons, and positrons (anti-electrons) d. electrons, and positrons (anti-electrons) e. protons, neutrons, electrons
An aircraft weighing 1,500 N has a mass of 153 kg
a. True b. False Indicate whether the statement is true or false
Energy Conservation With Nonconservative Forces: A 7.5-kg otter slides down a hill, starting from rest at the top. The sloping surface of the hill is 8.8 m long, and the top is 6.5 m above the base. If the speed of the otter at the bottom of the hill is 9.2 m/s, how much energy was lost to nonconservative forces on the hill?
Fill in the blank(s) with the appropriate word(s).