An object is raised above the ground gaining a certain amount of potential energy. If the same object is raised twice as high it gains _____.
Four times as much potential energy
Twice as much potential energy
Half as much potential energy
Neither of these
Car A has a mass of 1000kg and a speed of 30km/hr. Car B has a mass of 500kg and a speed of 60km/hr. What is true about their kinetic energies?
Car A's KE is twice Car B's KE
Car A's KE is equal to Car B's KE
Car A's KE is half of Car B's KE
Car A's KE is four times as muhc as Car B's KE
Two identical arrows, one with twice the kinetic energy of the other, are fired into a hay bale. The faster arrow will penetrate _____.
The same distance as the slower arrow
Twice as far as the slower arrow
Four times as far as the slower arrow
More than four times as far as the slower arrow
Which of the following is not a unit for power?
Joule per second
An object that has gravitational potential energy has this energy because of its _____.
A ball is projected into the air with 100 J of kinetic energy which is transformed to gravitational potential energy at the top of its trajectory. When it returns to its original level after encountering air resistance, its kinetic energy is _____.
Less than 100J
More than 100J
Not enough information dude!
A feather and a coin dropped in a vacuum fall with equal _____.
Two identical arrows, one with twice the speed of the other, are fired into a hay bale. The faster arrow will penetrate ____________.
An object that has kinetic energy must be _____.
At an elevated Position
Engine A has a power rating of 500W and Engine B has a power rating of 1000W. What is true?
Engine B can do more work than Engine A
Engine B can change more KE than Engine A
Engine A can do more work than Engine B
Both engines can do the same amount of work, but Engine B can do the work faster.