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BJU Physics Chapter 11 Test

Terms in this set (15)

momentum
kg x m/s is the SI unit of measurement for...
d
calculate the momentum of a truck having a mass of 10,000 kg that has a velocity of 25.0 m/s west
a. 400 N west
b. 400 kg x m/s
c. 250,000 kg x m/s
d. 250,000 kg x m/s west
velocity
Doubling the momentum of a certain object could mean doubling its...
thrust
Newton's third law is related to recoil momentum and...
partially inelastic collision
the collision of two cars involved in a wreck would be an example of a...
elastic collision
Billiard balls collide into one another and total kinetic energy is conserved. This is an example of a...
true
if one mass collides elastically with another mass, causing the stationary mass to begin moving with the velocity of the first and the first mass to stop moving altogether, then the masses are equivalent.
inelastic
what type of collision is defined by some kinetic energy converted into other forms?
not always
Do masses with large velocities always have larger momentum? larger masses?
true
T/F Falling masses gain downward velocity as they fall due to gravity. Since their velocity increases so does their momentum downward.
yes; yes; impulse
is momentum a vector quantity? what about the change in momentum? what do you call a change in momentum?
true
T/F bending your knees when landing decreases momentum, ultimately preventing you from serious injury. this is because change in momentum occurs over a larger amount of time.
false
T/F non conservative forces are at work in elastic collisions.
yes
is momentum conserved in 2D collisions?
false
most collisions occur in one dimension
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