Physical Science Units 1-4

Definitions I

100

A measurement with magnitude only

Scalar

200

How fast, and in which direction, an object is moving from its initial position

Velocity

300

How far an object has travelled from its original position

Displacement

400

A slope that indicates increase in speed/direction is a __________ slope.

Positive

500

A constant acceleration which has a value of 9.8m/sec/sec is called...

Gravity

Definitions II

100

A measurement with magnitude & direction

Vector

200

How fast an object is going

Speed

300

How far an object has traveled

Distance

400

A slope that indicates decrease in speed/direction is a __________ slope.

Negative

500

The name for equations used to predict information about motion are called...

Kinematic equations

Graphs

100

What type of line indicates an object at rest?

Horizontal line

200

What type of line indicates positive acceleration?

Upward, from left to right

300

What type of line indicates an object is being thrown?

A U-shaped line

400

What type of line indicates negative acceleration?

Downward, from left to right

500

The slope of a Velocity-Time graph tells you about the _______________ of a moving object. 

Acceleration

Formulas

100

What is the formula for speed?

V = s/t

or Distance= speed/time

200

What is the formula for velocity?

Velocity = displacement/time

300

What is the formula for acceleration?

Acceleration = change in velocity/ change in time

400

What is the formula for Average Velocity?

Change in Velocity = gravity x time

500

What is the unit for Gravity?

9.8m/sec/sec

Problems

100

A dog runs at a speed of 3 miles/hr for 1 hour 30 mins. What distance did the dog cover?

4.5 miles

200

Your car breaks down on the side of the road 2.5 miles from school. If you have 20 minutes to make it to class, what speed do you need to run at to arrive in time for your Calculus Exam?

8 miles per hour

300

If you have errands to run and you leave your house and drive 7.6 miles to the bank, 2.9 miles to Trader Joes, .3 miles to the gas station, and then 8.2 miles back home, what is your total displacement?

0 miles

400

Is it possible to maintain a constant velocity when turning a corner? Explain. 

No, because your direction will change. In order for velocity to remain constant, your direct must not change. You can maintain the same speed, but not velocity.