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PHY 150 NOVA ASTRONOMY MIDTERM Exam Questions with correct answers

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PHY 150 NOVA ASTRONOMY MIDTERM Exam Questions with correct answers What does the area under a Force vs. time graph represent? - Impulse (change in momentum) What does the area under a force vs. position graph represent? - Work W = ∆K - W = Final KE - Initial KE What is an elastic collision? - a collision in which kinetic energy is conserved. Inital KE = Final KE (objects stick together) What is an inelastic collision? - An inelastic collision is a collision in which kinetic energy is not

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PHY 150 NOVA ASTRONOMY MIDTERM Exam Questions with correct answers



What does the area under a Force vs. time graph represent? - ✅✅Impulse (change in momentum)



What does the area under a force vs. position graph represent? - ✅✅Work



W = ∆K - ✅✅W = Final KE - Initial KE



What is an elastic collision? - ✅✅a collision in which kinetic energy is conserved.

Inital KE = Final KE (objects stick together)



What is an inelastic collision? - ✅✅An inelastic collision is a collision in which kinetic energy is not
conserved. Inital KE ≠ Final KE



How do you find the initial kinetic energy of a system? - ✅✅Calculate the two initial kinetic energies
separately (using initial velocities) and add them together



How do you find the final kinetic energy of a system? - ✅✅Calculate the two final kinetic energies
separately (using final velocities) and add them togther



What is impulse? - ✅✅Change in momentum (I = final p - initial p)



What happens to momentum during any type of collision? (whether it's elastic or inelastic) -
✅✅Momentum is ALWAYS conserved (initial p = final p)



What happens during a perfectly inelastic collision? - ✅✅The colliding objects stick together.



What happens to final velocity of two objects in perfectly inelastic collisions? - ✅✅The final velocities
are the same (V_final_1 = V_final_2)

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