Calculating changes in Motion

The SI unit for acceleration is

• mph
• ft/sec²
• m/s²

When are you undergoing an acceleration in a car? 

• speed up
• slow down
• make turns
• All of the above 

Why does a car accelerate as it round a corner at a constant speed?

• Its direction changes
• It doesn't
• It slows down
• Its speeds up  

Tags

NGSS.MS-PS2-2

A negative acceleration means that your object is _____. 

• not accelerating
• not moving
• speeding up 
• slowing down 

A drag racer accelerated from 0 m/s to 200 m/s in 5 s.  What was the acceleration?

• 0 m/s
• 40 m/s²
• -40 m/s²
• 40 m/s

Tags

NGSS.MS-PS2-2

Acceleration only takes place when things speed up. 

• True
• False

Acceleration: is the rate of change in ___________.

• speed
• distance
• velocity 
• displacement 

A car accelerates from a standstill to 70 m/s in 10 seconds.  What is the acceleration?

• 0.7m/s2
• 7m/s2
• 14m/s2
• none of the above

Tags

NGSS.HS-PS2-1

A car accelerates from 15 m/s to 60 m/s in 30 seconds.  What is its acceleration?

• 2 m/s2
• 3 m/s2
• 1.5 m/s2
• 0.75 m/s2

A dog runs with an initial speed of 7.5 m/s on a waxed floor.  It slides to a stop in 15 seconds.  What is the acceleration?

• -7.5 m/s
• -7.5 m/s²
• -0.5 m/s²
• 7.5 mi//hr

Tags

NGSS.MS-PS2-2