physics lab 2 quiz

A car travels 20.0 km north and then 35.0 km in a direction 60.0 degrees west of north. Find the magnitude and direction of the car's resultant displacement. 48.2 km @ 38.9 degrees east of north 48.2 km @ 38.9 degrees west of north 40.3 km @ 60.26 degrees west of north 48 km @ 39 degrees west of north 48.2 km @ 38.9 radians east of north

48.2 km @ 38.9 degrees west of north

Given: Vector-A = 50N @ 45 degrees and Vector-B = 30N @ 120 degrees. If you graphically add Vector-A to Vector-B the best estimate of the resultant Vector-R is 65N @ 70 degrees 80N @ 165 degrees 20N @ 75 degrees 58N @ 165 degrees 90N @ 72 degrees

65N @ 70 degrees

If you are given that A and B are forces acting on an object and A = 3 lbs and B = 6 lbs what is the maximum force that can act on that object? 3 lbs 6 lbs 9 lbs 18 lbs 0 lbs

9 lbs

Time is not a vector quantity. True False

True

When two force vectors are added the resultant is found experimentally by balancing the resultant of the vectors against the equilibrant. True False

True

The sum of two or more vectors is called: Equilibrant Scalar Resultant Additive Direction

resultant

A quantity which can be specified by a numerical value coupled with the appropriate units is referred to as: Scalar Vector Resultant Equilibrant tensor

scalar

In the study of physics certain quantities are specified simply by stating the numerical value of the quantity along with appropriate units. Such quantities are referred to as tensors vectors scalars dimensions displacements

scalars

Which of the following types of quantities is NOT a vector? force velocity acceleration speed displacement

speed

Before placing vectors on the force table, you must convert them using a scale which sets up a correspondence of their __________ to ____________. weight; length weight; height mass; length length; mass weight; mass

weight; length

A major source of error in this experiment is using judgment when testing for equilibrium one fails to insure that all strings point exactly at the center of the pin failing to accurately measure the mass of the weight hangers when establishing the direction of the resultant force vector to discriminate between gram masses and gram weights to determine the friction in the support pulleys

when testing for equilibrium one fails to insure that all strings point exactly at the center of the pin

Which of the following quantities is a vector? mass length time volume force

force

f you are given that the resultant of two vectors equals 15.0 N @ 33.0 degrees what is their equilibrant? 15 N @ 23 degrees 15.0 N @ 213 degrees 15 N @ 210 degrees 15 N @ 180 degrees 30.0 N @ 213.0 degrees

15.0 N @ 213 degrees

Given Vector-A is 40. N @ 53 degrees what is the magnitude of the horizontal component of Vector-A? The component is called Vector-Ax. 31.9 24 zero 24.1 -36.7

24

If you are given that A and B are forces acting on an object and A = 3 lbs and B = 6 lbs what is the smallest force that can act on that object? 3 lbs 6 lbs 9 lbs 18 lbs 0 lbs

3 lbs

Given Vector-A is 40. N @ 53 degrees what is the magnitude of the vertical component of Vector-A? The component is called Vector-Ay. 32 24.1 zero 31.9 15.8

32

Based on a graphical sketch of Vector-A equal to 50N @ 30 degrees and Vector-B equal to 50N @ 60 degrees the best estimate of the equilibrant Vector-E is 95 N @ 30 degrees 95 N @ 60 degrees 95 N @ 90 degrees 95 N @ 45 degrees 95 N @ 225 degrees

95N @ 225 degrees

Based on a graphical sketch of Vector-A equal to 50N @ 30 degrees and Vector-B equal to 50N @ 60 degrees the best estimate of the resultant Vector-R is 95 N @ 30 degrees 95 N @ 60 degrees 95 N @ 90 degrees 95 N @ 45 degrees 95 N @ 225 degrees

95N @ 45 degrees

Which of the following symbol(s) can be used to indicate that a quantity is a vector? always a capital letter bold letter letter with arrow above it B and C All of the above

B and C

The order of the addition of two or more vectors matters. True False

False

Vectors are normally represented by curved arrows. True False

False

If your weight hangers did not have an exact mass of 50.0 g (which you assume) would that affect your determination of the equilibrant? Yes No

Yes

When two or more vectors are added together, must they all have the same units? Yes No

Yes

To experimentally verify the process of doing vector addition graph paper is needed trigonometry is needed a force table is used the parallelogram method is used the tip-to-tail addition method is used

a force table is used

When two force vectors are added the resultant is found experimentally by adding the respective magnitudes then adding respective directions graphically superimposing the two vectors on the x-axis graphically combining the vectors so that the tip of one connects to the tail of the other balancing the resultant of the vectors against the equilibrant using trigonometry

balancing the resultant of the vectors against the equilibrant

A vector which is equal in magnitude to the sum of two or more vectors but opposite in direction is referred to as: Equilibrant Resultant Balance Scalar tensor

equilibrant

You balanced the original set of vectors with their ____________. Resultant Equilibrant Sum Difference Total

equilibrant

The purpose of this experiment is to find the resultant of a set of vectors using the notion that the equilibrant is equal and opposite to the resultant the resultant is a single vector that balances the vector sum at equilibrium the equilibrant equals zero at equilibrium the sum of the resultant and equilibrant is positive the parallelogram method of addition is valid

the equilibrant is equal and opposite to the resultant

he purpose of the center pin is _____________________. To tie the strings to To hold the ring in place while adding masses to the weight hanger To provide a center point to mark 180 degrees to mark 360 degrees

to hold the ring in place while adding masses to the weight hanger

A quantity which is specified by a magnitude and direction with the appropriate units is referred to as: Scalar Vector Tangent Operator tensor

vector