Motion (Physics) - review

When you know both the speed and direction of an object's motion, you know the (a)  

• velocity of an object

• acceleration of the object

• displacement of the object

Answer explanation

Knowing both the speed and direction of an object's motion allows you to determine its velocity.

Mathematical Equivalence

ON

Tags

NGSS.HS-PS2-4

How can we find the value of the instantaneous speed with a position graph?

• The slope of the curve at the origin

• The slope of the curve at the desired time

Answer explanation

The instantaneous speed can be found by calculating the slope of the curve at the desired time.

Give the correct SI unit for the different propositions:

Distance: ​ (a)  

Velocity: ​ (b)  

Acceleration: ​ ​ (c)  

• meter

• m/s

• m/s2

• miles

• mph

• km

• km/h

• seconds

• kilogram

• hours

Answer explanation

The correct SI unit for distance is meter (m), for velocity is meter per second (m/s), and for acceleration is meter per second squared (m/s^2).

• Time
• Distance
• Velocity
• Acceleration
• Volume
• Preassure
• Temperature

Tags

NGSS.MS-PS3-4

​ (a)   = ​ (b)   + direction

• Velocity
• Speed

Tags

NGSS.MS-PS3-1

What is the SI unit for time?

• Hour

• Minute

• Second

• Day

Answer explanation

The SI unit for time is the Second. It is the most fundamental unit of time measurement.

What is speed?

• how far you go

• how much distance is covered over a period of time

• how fast you accelerate

• the change in the location of a object

Answer explanation

Speed is the measure of how much distance is covered over a period of time. It quantifies the rate at which an object moves.

Tags

NGSS.MS-PS3-1

In which graph is the runner not moving?

• graph A

• graph B

• graph C

• graph D

Tags

NGSS.MS-PS3-1

Which graph indicates that one runner started 10 yards ahead of the other?

• graph A

• graph B

• graph C

• graph D

Tags

NGSS.MS-PS3-1