Physics

Question 1

Vector

Answer 1

Has both magnitude and direction; includes displacement, velocity, acceleration, force

Question 2

Scalar

Answer 2

Quantities without direction; speed

Question 3

Displacement vs. distance

Answer 3

Displacement = change in position, straight line between start and end; distance = scalar, represents the path traveled

Question 4

Average velocity

Answer 4

Total displacement divided by total time

Question 5

Average speed

Answer 5

Total distance traveled divided by total time

Question 6

Static friction

Answer 6

Between 2 objects that are not in motion relative to each other; can take on many values depending on magnitude of applied force; coefficient of static always higher than coefficient of kinetic friction

Question 7

Kinetic friction

Answer 7

Between 2 objects that are in motion relative to each other; constant value

Question 8

Mass vs. weight

Answer 8

Mass = measure of inertia of object - amount of material; Weight = force experienced by a given mass due to its gravitational attraction to Earth

Question 9

Dot product

Answer 9

the product of the vectors’ magnitudes and the cosine of the angle between them; result is a scalar quantity

Question 10

Cross product

Answer 10

the product of the vectors’ magnitudes and the sine of the angle between them; result is a vector quantity; use RHR to find vector direction