britches

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 of these.

13 years ago

Which requires more power? lifting a 25 kg bag of cement 10 m vertically in 1 minute, or lifting a 50 kg bag 5?

13 years ago

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 distance of ____________________. A) 1 meter. B) 0.5 meter. C) 0.25 meter. D) None of these.

13 years ago

6. You have kinetic energy when you run. If you run three times as fast, you'll have a kinetic energy ____________________. A) 3 times as much. B) 6 times as much. C) 9 times as much. D) that is the same. E) None of these.

13 years ago

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

13 years ago

How many joules of potential energy does a 1.5 kg book gain when it is elevated 4.2 m?

13 years ago

Calculate the change in potential energy of 7.8 million kg of water dropping 50 m over Niagara Falls.

13 years ago

An object that has kinetic energy must have which of the following?A) momentumB)acceleration c all of these d none of these

13 years ago

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 stuck-together blobs of putty immediately after colliding.

13 years ago

As more branches are added to a parallel circuit, the overall resistance of the circuit does which of the following?. A) remains the same.B) definitely decreases.C) definitely increases.D) may increase.E) may decrease.

13 years ago

The actual speed of electrons drifting along in a common electric circuit is about the speed of which of the following?. A) sound.B) a fast-moving automobile.C) light.D) a slow-moving snail.

13 years ago