physical science module 6 quiz

Refernce point

A point against which position is measured

displacement

the distance an object travels plus the direction from the starting point

vector quantity

a physical measurement that contains both magnitude (number) and directional information

scalar quantity

a physical measurement that contains only magnitude (number) and does not contain directional information

acceleration

The time rate of change of an object's velocity

If you are a passenger in the rear seat of a car moving at a steady speed, relative to whom are you at rest?

the driver in the front seat3 MULTIPLE CHOICE OPTIONS

you walk 1 mile every day for exercise, leaving your front door at 9:00 am and returning to your front door at 9:25 am. what is the total displacement of your daily walk?

03 MULTIPLE CHOICE OPTIONS

You are looking in a scientist's lab notebook and find the following unlabeled measurements. In each case, determine what physical quantity the scientist was measuring. a. 12.1 m/s (be able to write the answer)

Speed. this measurement has a distance unit divided by a time unit. that's speed or velocity. since no direction is given, this is speed.

You are looking in a scientist's lab notebook and find the following unlabeled measurements. In each case, determine what physical quantity the scientist was measuring.b. 31.2 ft. southwest (be able to write the answer)

Displacement. the unit of feet by itself measures distance but with directional information it is displacement.

You are looking in a scientist's lab notebook and find the following unlabeled measurements. In each case, determine what physical quantity the scientist was measuring.c. 14 mm/h west (be able to write out the answer)

velocity. the measurement has a distance unit divided by a time unit and it includes a directional information, so it is a velocity.

You are looking in a scientist's lab notebook and find the following unlabeled measurements. In each case, determine what physical quantity the scientist was measuring. d. 4.5 yd/min² north (be able to write out the answer)

Acceleration. This measurement has a distance unit divided by a time unit squired. That's acceleration. The directional information is necessary because acceleration is a vector quantity.

a person drives north 3 block, then turns west and drives 4 blocks. The driver then turns south and drives 3 blocks. How could the driver have made the distance shorter while keeping the dame displacement?

by driving west 4 blocks from the starting point3 MULTIPLE CHOICE OPTIONS

Speed is defined as the ratio of the distance an object moves to what?

the amount of time needed to travel the distance3 MULTIPLE CHOICE OPTIONS

What does the slope of a distance-time graph indicate?

speed3 MULTIPLE CHOICE OPTIONS

What does the slope of a speed-time graph indicate?

acceleration3 MULTIPLE CHOICE OPTIONS

What does a horizontal (flat) line on a distance-time graph mean?

the object is at rest3 MULTIPLE CHOICE OPTIONS

A car traveled 84 km in 1 hour, 92 km in the next hour and then 122 km in the next 2 hours before arriving at its destination. What was the car's average speed? (show your work on your test)

74.5 km/h3 MULTIPLE CHOICE OPTIONS

How many miles per hour does a car travel if it makes a 40 mile trip in 30 minutes? (on the test- 4points question- show your work, with converting)

80 mi/hr3 MULTIPLE CHOICE OPTIONS

What is the velocity of a bicycle (in m/s) if it travels 1 km west in 4.1 min? (show your work, this is worth 4 points on the test!)

4.07 m/s west3 MULTIPLE CHOICE OPTIONS

an eagle swoops down to catch a baby rabbit. Luckily for the rabbit, he sees the eagle and runs. An all-out chase ensures with the rabbit running east at 5.4 m/s and the eagle pursuing at 4.4 m/s. What is the relative velocity of predator and prey? (2 points- 1 for speed & 1 for direction)

relative speed = 5.4 m/s - 4.4 m/s = 1.0 m/s3 MULTIPLE CHOICE OPTIONS

What is the acceleration of an object that moves with a constant velocity?

zero- since the velocity is not changing, the acceleration is zero3 MULTIPLE CHOICE OPTIONS

A skier reaches the bottom of a slope with a velocity of 12 meters per second north. If the skier comes to a complete stop in 3 seconds, what was their acceleration? (on test this is 4 points. need to show your work!)

4 m/s² south3 MULTIPLE CHOICE OPTIONS

a car goes from 0 to 60 mi/h north in 5 s. what is the car's acceleration? (4pt. show your work!)

43,165 mi/h²3 MULTIPLE CHOICE OPTIONS

know how to look at a graph and be able to state if it shows constant speed vs acceleration speed. be able to explain how you know this.

Look at page 198 & 215- look at graphs and be able to explain why you know what you know!