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britches
Questions and answers by
britches
Questions (20)
Two identical gliders slide toward each other on an air track. One moves at 2 m/s and the other at 1 m/s. If they stick
2 answers
572 views
7. If superman in space throws a boulder with 10 times as much mass as himself, and the boulder leaves his hands at 100 m/s, how
1 answer
437 views
6. A cannon with a long barrel fires a shell faster because the shell experiences a greater ____________________.
A) change in
2 answers
544 views
A fast-moving massive car has a head-on collision with a slow-moving light car. Upon which is the impulse greater?
A) The massive
1 answer
475 views
A truck moves with a certain momentum. If both its speed and its mass are doubled, how much greater is its momentum?
A) Two
2 answers
586 views
5. An object that has kinetic energy must have
A) momentum. B) acceleration. C) a force applied to it. D) All of these. E) None
3 answers
534 views
Which requires more power? lifting a 25 kg bag of cement 10 m vertically in 1 minute, or lifting a 50 kg bag 5?
2 answers
1,029 views
5. An object that has kinetic energy must have
A) momentum. B) acceleration. C) a force applied to it. D) All of these. E) None
1 answer
449 views
Consider an ideal pulley system. Pull one end of a rope downward by 1 meter with 50 N of force, and you'll lift a 200-N load a
3 answers
1,383 views
6. You have kinetic energy when you run. If you run three times as fast, you'll have a kinetic energy ____________________.
A) 3
3 answers
1,348 views
Consider an ideal pulley system. Pull one end of a rope downward by 1 meter with 50 N of force, and you'll lift a 200-N load a
3 answers
1,202 views
Calculate the watts of power expended when a force of 1.8 N moves a book 2.0 m in a time interval of 1.0 M/S
3 answers
772 views
How many joules of potential energy does a 1.5 kg book gain when it is elevated 4.2 m?
3 answers
429 views
Calculate the change in potential energy of 7.8 million kg of water dropping 50 m over Niagara Falls.
3 answers
578 views
An object that has kinetic energy must have which of the following?A) momentumB)acceleration c all of these d none of these
1 answer
377 views
5. An object that has kinetic energy must have ____________________.
A) momentum. B) acceleration. C) a force applied to it. D)
1 answer
695 views
Part A
A 3.00 kgblob of putty moving at 2.4 m/s slams into a 4.80 kg blob of putty at rest. Calculate the speed of the two
1 answer
513 views
Consider an ideal pulley system. Pull one end of a rope downward by 1 meter with 50 N of force, and you'll lift a 200-N load a
2 answers
737 views
As more branches are added to a parallel circuit, the overall resistance of the circuit does which of the following?. A) remains
4 answers
1,591 views
The actual speed of electrons drifting along in a common electric circuit is about the speed of which of the following?. A)
2 answers
843 views
