Universal Gravitation, Circular Motion, And Energy: Question Preview (ID: 29506)


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How much total mechanical energy does a 600 kg plane, flying at 60 m/s 200 m above the ground, have?
a) 18,000 J b) 1,200,000 J c) 1,080,000 J d) 2,280,000 J
The continued existence of massive numbers of baby seals contribute to the world's global energy problems.
a) False b) True c) d)
The total Mechanical Energy in a closed system never changes.
a) True b) False c) d)
An annoying fly is buzzing around your head, flying in perfect circles just outside your arms reach 1 meter away. It completes a trip around your head every 6 seconds. What is the centripetal acceleration of the fly?
a) 0.03 m/s/s b) .25 m/s/s c) 1 m/s/s d) 4 m/s/s
An annoying fly is buzzing around your head, flying in perfect circles just outside your arms reach 1 meter away. It completes a trip around your head every 6 seconds. What is the velocity of the fly?
a) .17 m/s b) .5 m/s c) 1 m/s d) 2 m/s
On an alien planet the acceleration due to gravity is 12.6 m/s/s instead of the 9.8 m/s/s we have on Earth. If the radius of the planet is 5.2*10^6 meters, what is it's mass? (Hint: G = 6.671*10^-11)
a) 5.1*10^24 kg b) 9.8*10^17 kg c) 5.1 * 10^17 kg d) 9.8*10^24 kg
If you triple the speed of a moving object, how much more/less Kinetic Energy does it have?
a) a third as much b) the same amount c) three times as much d) nine times as much
If you triple the mass of a moving object, how much more/less Kinetic Energy does it have?
a) a third as much b) the same amount c) three times as much d) nine times as much
A car travelling around a track with a radius of 40 m completes 5 laps in 5 min. What is the period?
a) 5 min b) 251 meters c) 4.2 m/s d) 60 seconds
If you do 1,200 J of work to move a box up 3 meters, how much force did you exert?
a) 400 N b) 1,200 N c) 3,600 N d) Impossible to tell
A student standing on a platform has 30 kJ of energy before he steps off. If the student has a mass of 90 kg, approximately how far off the ground is he?
a) 0.3 m b) 3 m c) 33 m d) 333 m
A student standing on a platform has 30 kJ of energy before he steps off. How much energy does he have the instant before he lands on the ground?
a) 0 J b) 30 J c) 30,000 J d) Impossible to tell.
3 moons orbit a planet. Moon A orbits at 4000 km, Moon B orbits at 24,000 km, and Moon C orbitsw at 48000 km. The masses of all 3 moons are identical. Which satellite is experiencing the smallest centripetal accelleration?
a) Moon A b) Moon B c) Moon C d) Impossible to tell
3 moons orbit a planet. Moon A orbits at 4000 km, Moon B orbits at 24,000 km, and Moon C orbits at 48000 km. The masses of all 3 moons are identical. Which satellite is experiencing the largest centripetal accelleration?
a) Moon A b) Moon B c) Moon C d) Impossible to tell
3 moons orbit a planet. Moon A orbits at 4000 km, Moon B orbits at 24,000 km, and Moon C orbits at 48000 km. The masses of all 3 moons are identical. Which satellite has the highest orbital speed?
a) Moon A b) Moon B c) Moon C d) Impossible to tell
3 moons orbit a planet. Moon A orbits at 4000 km, Moon B orbits at 24,000 km, and Moon C orbits at 48000 km. The masses of all 3 moons are identical. Which satellite has the lowest orbital speed?
a) Moon A b) Moon B c) Moon C d) Impossible to tell.
Two masses that are 100 m apart attract each other with a force of 120 N. When they are 400 m apart, these masses will attract each other with what force?
a) 7.5 N b) 30 N c) 480 N d) 1920 N
Two masses that are 100 m apart attract each other with a force of 120 N. When they are 25.0 m apart, these masses will attract each other with what force?
a) 7.5 N b) 30 N c) 480 N d) 1920 N
How much Kinetic energy does a 600 kg plane, flying at 60 m/s 200 m above the ground, have?
a) 18,000 J b) 1,200,000 J c) 1,080,000 J d) 2,280,000 J
How much gravitational potential energy does a 600 kg plane, flying at 60 m/s 200 m above the ground, have?
a) 18,000 J b) 1,200,000 J c) 1,080,000 J d) 2,280,000 J
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