Speed is ...

• a measure of how fast something is moving

• the distance covered per unit time

• always measured in terms of a unit of distance divided by a unit of time

• All of these answers

Tags

NGSS.MS-PS3-1

What is the difference between speed and velocity?

• Speed is magnitude and direction

• Velocity is magnitude(speed) and direction

• Velocity includes acceleration

• Speed is velocity and direction

A 200 kg cannon ball and 5 g ping pong ball are dropped from 20 m at the same time. Which objects hits the ground first?

• Ping pong ball

• Cannon ball

• Neither, they float off into space

• Both objects hit the ground at the same time

Which statement best describes the ability of a human to measure time with a stop watch.

• Stop watch timing is the most accurate and is used at the Olympics

• Stop watch timing is subject to hand eye coordination and therefore, is not accurate, especially with short time periods

• Stop watch timing cannot be trusted at all

• Stop watch timing is never used in real life

One possible unit of speed is

• miles per hour

• kilometers per hour

• light years per century

• All of these

Tags

NGSS.MS-PS3-1

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

Tags

NGSS.MS-PS3-1

What is velocity?

• the quickness of an object
• the location of an object
• acceleration
• speed in a specific direction

Speed is different from velocity because

• Velocity has a direction
• Speed uses Distance /Time
• Velocity doesn't include time
• Velocity doesn't include distance

Total distance divided by total time is

• average speed
• constant speed
• instantaneous speed
• acceleration

Tags

NGSS.MS-PS3-1

A runner races in the 100 meter dash.  It takes her 10 seconds to finish.  What is her average speed?

• 10 m/s
• 1000 m/s
• 100 seconds
• 10 seconds

Tags

NGSS.MS-PS3-1