M02 Chapter 3 and 4 Assessment
When the speed of an object is doubled, its momentum _______. - ANS-doubles
Which has more momentum after firing, the cannonball or the recoiling cannon? -
ANS-They are both the same.
Earth is gravitationally pulled toward _______. - ANS-All the choices are correct.
Newton did not discover gravity, for early humans discovered that whenever they fell.
What Newton did discover is that gravity _______. - ANS-extends throughout the
universe.
Raising an car in a service station requires work. Raising it twice as high requires
_______. - ANS-twice the work
Which of the following equations is most useful for solving a problem that asks for the
distance a fast-moving crate sliding across a factory floor in coming to a stop? - ANS-Fd
= Δ1/2 mv 2
According to the law of energy conservation, energy can be _______. - ANS-only
transferred or transformed
he main sources of energy on Earth are _______. - ANS-solar and nuclear
Consider a space probe three times as far from Earth's center as it would be at Earth's
surface. Compared to at Earth's surface, its gravitational attraction to Earth at this
distance is about _______. - ANS-one-ninth as much
When you toss a projectile sideways, it curves as it falls. It will be an Earth satellite if the
curve it makes _______. - ANS-matches the curved surface of Earth
The impulse-momentum relationship is a direct result of Newton's _______. -
ANS-second law
The Moon falls toward Earth in the sense that it falls _______. - ANS-beneath the
straight-line it would take without gravity
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