PS Test 1 - Review

Distance & Displacement

100

What math do you need to do to find distance?

Add

200

What type of math do you need to do to find displacement?

Subtract

300

What is the difference between distance and displacement?

Distance does not depend on direction, but displacement depends on direction.

400

What does displacement look at?

Initial position & final position

500

Will distance and displacement always be the same? Explain

No, because displacement involves direction. Also, if an object's ending position is the same as its starting position, the object will not displacement.

Speed & Velocity

100

What is the equation for speed?

distance/time

200

Define velocity.

Speed with direction.

300

If Rob travels on a skateboard 12 meters in 3 seconds, how fast is he going?

4 m/s

400

A train going 60 km/hr travels 100 kilometers. How much time does it take the train to get to its destination?

1.67 hr

500

On vacation, you and your family go from Charleston to New Orleans. You leave at 7:00 am and arrive at 4:00 pm, and the trip’s distance is 850 miles. Calculate your average velocity.

94.44 m/s South

Acceleration

100

What is acceleration?

A change in velocity over time.

200

What is the equation for acceleration?

(v_f - v_i) / t

300

How many types of acceleration are there and what are they?

3; Positive, Negative, & zero

400

A skateboarder starts at the top of a ramp and reaches a speed of 7.0 meters per second at the bottom of the ramp in 3.0 seconds. What is the skateboarder’s acceleration?

2.33 m/s²

500

While starting a race from rest, a runner travels for 6.0 seconds at an acceleration of 1.67 m/s². What is the final velocity of the runner at the end of 6.0 seconds?

10.02 m/s

Scalar & Vector Quantities

100

Define scalar quantity.

Magnitude only

200

How does a vector quantity differ from a scalar quantity?

Vector quantities need direction.

300

What is 30 cm as a scalar quantity and a vector quantity?

Scalar - 30cm

Vector - 30cm + direction

400

What is magnitude?

Number & units

500

What are 3 scalar & 3 vector quantities that we have discussed so far?

Scalar - distance, speed, & time

Vector - displacement, velocity, & acceleration

Units

100

How is time measured?

Seconds, minutes, hours, days, weeks, months, years

200

What is the unit for distance?

Meters; m

300

What are the units for velocity?

m/s + direction

400

What are the units for acceleration?

m/s²

500

What do units do?

Units make the numbers makes sense.