Acceleration Practice/Retest

Which of the following is a unit for acceleration?

• km/s
• m/s²
• mi/hr
• ft

Tags

NGSS.HS-PS2-1

When a car goes around a corner at 20 mph, why do we say it  accelerates?

• The car is accelerating because of the velocity is constant
• The car accelerates because it's going 20 mph
• Cars always accelerate when they are in motion
• The car is accelerating because it's changing direction

Of the following, which is a vector?

• Mass
• Time
• Speed
• Velocity

Acceleration is defined as the CHANGE in

• time it takes for one place to move to another place.

• change in velocity of an object.

• distance divided by the time interval

• change in velocity divided by the time interval

A roller coasters 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

Tags

NGSS.HS-PS2-1

In each of the following cases, determine where the car has no acceleration ?

• A car shortly after a stoplight turns green.
• A car approaching a red light
• A car with the cruise control set at 80 km/h
• A car turning a curve at a constant speed

Tags

NGSS.HS-PS2-1

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

Acceleration can be classified as _______________

• Speeding up
• Slowing Down
• Changing directions
• All of the above

Tags

NGSS.HS-PS2-1

In which of the following situations would a car be speeding up while traveling forward?

• positive velocity and positive acceleration

• positive velocity and negative acceleration

• negative velocity and positive acceleration

• negative velocity and negative acceleration

Tags

NGSS.HS-PS2-1

In which of the following situations would a car be slowing down while traveling backwards?

• positive velocity and positive acceleration

• positive velocity and negative acceleration

• negative velocity and positive acceleration

• negative velocity and negative acceleration