Acceleration

A golf ball accelerates off a tee at 15m/s², changing its velocity from 0m/s to 50 m/s down the fairway. How long did it take the golf ball to accelerate?

• 750 seconds
• 35 seconds
• 0.3 seconds
• 3.3 seconds

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NGSS.MS-PS2-2

A ball of clay is thrown at a wall at a velocity of 28.0 m/s.  After it hits the wall, it takes 0.020 s to stop.  What is the acceleration of the clay when it hits the wall?

• 1400 m/s²
• -1400 m/s₂
• 0.56 m/s²
• -0.56 m/s²

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

Acceleration is defined as the CHANGE in 

• time it takes for one place to move to another place. 
• velocity of an object.
• distance divided by the time interval 
• velocity divided by the time interval 

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 

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

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NGSS.MS-PS2-2

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  

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NGSS.MS-PS2-2

A negative acceleration means that your object is _____. 

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

What is velocity?

• the quickness of an object
• the location of an object
• acceleration
• speed in a specific direction

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

Tags

NGSS.HS-PS2-1