PHSI191-4-theory2

Churner

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What is the purpose of unit conversion?

To change the meaning of a quantity

To avoid using SI units

To express measurements in a consistent standard

To make calculations easier

None

If an object moves 5 meters east and then 5 meters west, what is its total displacement?

0 meters

10 meters

5 meters

Cannot be determined

None

If a vector is multiplied by a negative scalar, what happens to its direction?

It becomes zero

It points in a random direction

It remains the same

It reverses

None

How do you find the length of a resultant vector given two perpendicular components?

Use the Pythagorean theorem

Add the two components

Multiply the two components

Subtract the two components

None

Which of the following is NOT a vector quantity?

Acceleration

Displacement

Force

Mass

None

What is the correct way to subtract a vector?

Subtract the magnitudes directly

Add the inverse of the vector

Use vector addition with the inverse of the given vector

Ignore the direction and subtract the values

None

In the SI system, what is the base unit for measuring time?

Millisecond

Second

Minute

Hour

None

Which of the following represents the correct vector addition method?

Ignoring direction and adding magnitudes

Using head-to-tail method and applying trigonometry if necessary

Using head-to-tail method only all of the time

Connecting tails of vectors

None

Which of the following unit conversions is correct?

10km = 1000 meters

1 mile = 500 meters

1 kg = 1000 grams

1 inch = 1 cm

None

10.

What is the resultant of two vectors acting in opposite directions with equal magnitudes?

The product of their magnitudes

The sum of their magnitudes

Zero

A vector in the same direction as the larger vector

None

Time's up