400 Exam 2 Material

Question 1

COM

Answer 1

a fictitious point where all mass is considered to be connected

Question 2

Momentum

Answer 2

the quantity of motion of a moving body, measured as a product of its mass and velocity

Question 2

An object’s linear inertia must include

Answer 2

Mass
Linear Velocity

Question 3

Inertia

Answer 3

An objects resistance to change in motion

Question 4

By conventions, clockwise rotations are positive when analyzing 2-D motions

Answer 4

False

Question 5

A higher take-off angle will lead to a longer jump.

Answer 5

False

Question 6

The change in orientation of a rigid body in reference to some axis is

Question 7

The angular acceleration is positive if you are speeding up in the positive direction

Answer 7

True

Question 8

what is a part of a vector in a particular dimension/direction?

Answer 8

Component

Question 9

When a vector is not parallel to an axis, then a correction factor is utilized. __________ is a correction factor for the y- component while ________ is a correction factor for the x-component.

Answer 9

sine; cosine

Question 10

A body has a resultant velocity of 10 m/s with a resultant angle that is 60° from the positive x- axis. Which of the following describes the displacement?

Answer 10

The displacement is greater in the Y direction

Question 11

Which of the following elements will have a larger impact on trajectory when there is a difference in starting height?

Answer 11

Time in air

Question 12

What happens to the angular velocity if the angular acceleration is in the same direction as the direction of travel?

Answer 12

it increases

Question 13

which factor under your control has the largest effect on the range of a projectile?

Answer 13

Velocity take-off angle

Question 14

which factor under your control has the largest effect on the range of a projectile?

Answer 14

Velocity take-off angle

Question 15

Plane

Answer 15

Area where movements occur

Question 16

Resultant

Answer 16

Vector
that is equivalent to the combined effect of 2 or more vectors

Question 17

Component

Answer 17

2 or more vectors acting in diff directions

Question 18

Projectile

Answer 18

any airborne body that is only subjected to gravity and wind resistance after it has left the ground

Question 19

Trajectory

Answer 19

Path of a projectile

Question 20

Resultant

Answer 20

Vector that is equivalent to the combined effect of 2 or more vectors

Question 21

Rigid Body

Answer 21

Body that maintains constant shape

Question 22

Horizontal projectile

Answer 22

Horizontal displacement of a projectile

Question 23

An objects linear inertia must include

Answer 23

Mass
Linear Velocity

Question 24

Angular Speed

Answer 24

How fast a body is rotating with no regard to direction

Question 25

Angular Position

Answer 25

An orientation of a rigid body in reference to some axis

Question 26

Angular Displacement

Answer 26

the change in angular position between two time periods of interest

Question 27

Angular Velocity

Answer 27

Vector