Motion in One Dimension
If an object's displacement is constant, what is its velocity?
Zero
A vector is a quantity that has both direction and __________.
Magnitude
Which trigonometric function is used to determine the X displacement of a projectile fired at an angle?
Cos
What was the angle of entry for a bullet that makes a hole with a major axis of 18 mm and a minor axis of 9 mm?
30*
What fraction of gun violence incidents in the USA involve children?
1/4
If an object has a positive acceleration, what will happen to its velocity?
It will increase
What is the term for what is created when two or more vectors are added?
Resultant
What is the acceleration due to gravity? Include sign (+/-) and units in your answer.
-9.81 m/sec^2
While investigating a crime scene, officers insert a ballistic rod into a bullet hole in a vertical wall. The rod sticks out of the hole at an angle slightly above the horizontal. When a protractor is placed against the wall, the rod sits at the 78* mark on the protractor. What was the launch angle of the bullet?
-12*
Firearms are the leading cause of death for which group of people in the USA?
Children
A car travels 200 miles in 2.5 hours, what is its average speed?
80 mph
Quantities that have a magnitude, but no direction, are known as ________.
Scalars
Any object that has both vertical and horizontal components to its motion is considered to be a ________
Projectile
The determine the caliber of the bullet that made a particular hole, measure the ______ axis
Minor
The rate of homicides involving guns is approximately how many times higher in the USA than in any other country with a similar per capita GDP?
Every day, Mr. Cilley drives to work in the morning, and drives home in the afternoon. What is the average velocity of his car while driving?
Zero
What will be the x component of adding two vectors that each have x components of 7?
14
If a ball rolled off a horizontal building roof at 5 meters per second, and it takes 3 seconds to hit the ground, how far will it be from the table when it hits the ground?
15 meters
The spiral grooves on the inside of most firearm barrels are known as:
Rifling
By definition, a mass shooting is one where how many people, besides the shooter, are killed or injured in the same general location and time?
Four
How far will a car travel in 3.5 hours if it is driving at 50 miles per hour?
175 Miles
What is the term for determining the X and Y components of a vector?
Resolve/Resolving
Compared to a ball launched horizontally from a height of 10 meters, how long will it take a ball dropped from a height of 10 meters to fall to the ground?
It will take the same amount of time.
The residue left around a bullet hole by the bullet is known as ________ ______.
Bullet Wipe
Approximately how many gun-related suicides occur in the USA every year?
22,000