Graphing and Acceleration

What is the speeding up index of a car that increases it speed from 7m/s to 15m/s is 4 seconds?

• 8 m/s

• 8 m/s/s

• 2 m/s/s

• 2 m/s

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

• 0.1 m/s

• 100 m/s

• 1 m/s

• 10 m/s

in slowing down motion the acceleration is always opposite direction to the velocity

• true 
• false

A rightward-moving car increases its speed from 10.0 m/s to 20.0 m/s. Is the car accelerating?

• Yes
• No

The dot diagram represents the motion of a bicycle as it moves from left to right. Is the bicycle accelerating?

• Yes
• No

The dot diagram represents the motion of a bicycle as it moves from left to right. Is the bicycle accelerating?
 

• Yes
• No

speed in a certain direction defines

• speed

• velocity

• distance

• acceleration

A roller coasters accelerates from an initial velocity of of 6.0 m/s to a final velocity of 70 m/s over 4 seconds.  What's the acceleration?

• 24 m/s²
• 18 m/s²
• 16 m/s²
• 16 m/s

Tags

NGSS.MS-PS2-2

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

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