Chapter 1 Physics

If an object is moving eastward and slowing down, then the direction of its acceleration vector is _____________

Eastward

Westward

Neither

Northward

Which of the following situations represents a negative displacement? (Assume positive position is measured vertically upward along a y-axis.)

A cat stands on a tree limb

A cat jumps from the ground onto a tree limb

A cat jumps from a lower tree limb to a higher one

A cat jumps from a tree limb to the ground

If an object has an acceleration of 0 m/s^2, then one can be sure that the object is not _____________

Moving

Changing position

Changing velocity

Which of the following is NOT consistent with a car which is accelerating?

A car is moving with an increased speed

A car is moving with a decreasing speed

A car is moving with a high speed

A car is changing direction

When there is no air resistance, objects of different masses dropped from rest

Fall with equal accelerations and with equal displacements

Fall with different accelerations and with different displacements

Fall with equal accelerations and with different displacements

Fall with different accelerations and with equal displacements

Which of the following statements is NOT true of a free-falling object? An object in a state of free fall _____________

Falls with a constant speed of -9.81 m/s^2

Falls with a acceleration of -9.81 m/s^2

Falls under the sole influence of gravity

Falls with downward acceleration which has a constant magnitude

A lack of precision in scientific measurements typically arises from

Limitations of the measuring instrument

Human error

Lack of calibration

Too many significant figures

Objects that are falling toward Earth in free fall move

Faster and faster

Slower and slower

At a constant velocity

Slower than faster

How many significant figures are in the number 0.00000020000 kg

How many significant figures are in the number 850,990,000,000 mi

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