To say that an object is being accelerated, means that
1) it is at rest,
2) it is moving,
3) it is either at a state of rest or a state of constant velocity,
4) its state of motion is changing,
and we define acceleration to be
5) a change in speed.
6) a change in velocity.
7) the rate at which speed changes.
8) the rate at which velocity changes.
Question 2
The boat that will sail fastest in the intended direction is
1) 1,
2) 2,
3) 3,
4) 4,
and the boat that responds least to the wind is
5) 1.
6) 2.
7) 3.
8) 4.
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These photos show a rat burying a test object from which it has just received a single mild shock.
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