Multiple Choice
Two identical particles move toward each other, one twice as fast as the other. Just before they collide, one has a kinetic energy of 25 J and the other 50 J. At this instant their total kinetic energy is
A) 25 J.
B) 50 J.
C) 75 J.
D) none of the above
E) need more information
Correct Answer:

Verified
Correct Answer:
Verified
Q43: The center of a long uniform log
Q44: If an all-electric car has kinetic energy,
Q45: A car's engine is 20% efficient. When
Q46: A ball rolling down an incline has
Q47: The power required to exert 4-N force
Q49: A miracle car with a 100% efficient
Q50: The unit kilowatt-hour is a unit of<br>A)energy.<br>B)momentum.<br>C)power.<br>D)time.
Q51: Impulse involves the time that a force
Q52: A roller skate at rest may have<br>A)speed.<br>B)velocity.<br>C)momentum.<br>D)energy.
Q53: Earth's primary energy source is<br>A)the Sun.<br>B)fossil fuel.<br>C)electricity.<br>D)geothermal.