Accelerated Motion

initial v=5 m/s, final v=0 m/s, time is 20 seconds, how do you calculate the acceleration?

• (0-5)/20
• (5-0)/20
• 5/20
• 20/(5-0)

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 roller coaster accelerates from an initial velocity 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

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

The SI unit for acceleration is

• mph
• ft/sec²
• m/s²

Tags

NGSS.HS-PS2-1

What is happening in this graph from point B to C?

• The object is going down a hill.
• The object is returning to its starting location.
• The object is slowing down.
• The object is staying still.

What is happening in the graph from point O to A?

• The object is moving SLOWLY
• The object is moving FAST
• The object is NOT moving
• The object is accelerating

What is happening in this graph from point A to B?

• The object is accelerating.
• The object is not moving.
• The object is decelerating.
• The object is moving at a constant speed.

The rate at which velocity changes is called 

• motion
• average speed
• instantaneous speed
• acceleration

Acceleration of an object happens when things ________

• slow down
• go faster
• change direction (turn)
• All of the above