Acceleration, Speed, Velocity

The rate that a car's velocity changes is its

• speed

• force

• gravity

• acceleration

Tags

NGSS.HS-PS2-1

Acceleration is defined as the CHANGE in 

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

• the mass of an object divided by the time interval.

• the distance divided by the time interval 

• the velocity divided by the time interval 

A negative acceleration means that an object is _____. 

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

A roller coaster accelerates from an initial speed of 6.0 m/s to a final speed 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-PS2-1

NGSS.MS-PS2-2

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

In which of the following cases does a car have zero acceleration?

• A car speeding up after a stoplight turns green.

• A car slowing down when it approaches a stop sign.

• A car set on cruise control so that is maintains 45 mi/hr.

• A car turning a curve at a constant speed.

Which of the following is an example of deceleration?

• a car approaching a stop sign and slowing down

• a plane increasing speed down the runway and then taking flight

• a roller coaster moving down a steep hill 

• an airplane cruising in a straight flight plan

Tags

NGSS.MS-PS3-5

Which of the following is a unit of speed?

• km/hr

• Minutes

• Centimeters

• meters

Tags

NGSS.MS-PS3-1

Which statement best describes the motion of the toy vehicle during the first 30 seconds of the investigation?

• The vehicle was traveling at a constant speed

• The vehicle was accelerating at a constant rate

• The speed of the vehicle was increasing

• The acceleration of the vehicle was increasing

Tags

112.20.b.6.B

Which statement best describes the cart?

• The cart was stationary with a velocity of 0 m/s for the entire 7 seconds

• The cart was stationary except for a short burst of acceleration of 0.5 m/s²

• The cart moved at a constant velocity of 0.5 m/s for the entire 7 seconds

• The cart accelerated at a constant rate of approximately 0.8 m/s²

Tags

112.20.b.6.B