acceleration

the unit of acceleration is

• (m/s²)

• jouls

• m

• s

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A negative acceleration means that your object is  

• constant

• speeding up

• at rest

• slowing down

A positive acceleration means that your object is

• at rest

• speeding up

• moving

• slowing down

Acceleration: is the rate of change in

• velocity

• speed

• displacement

• direction

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When is an object under uniform acceleration?

• none of the following

• when the direction is straight

• when the velocity change is constant per unit time

• when the time is constant

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As the ball falls towards the ground, its velocity

• zero

• decreases

• at rest

• increases

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which isn't an example of acceleration

• When the car is speeding up.

• When the car slows down.

• When you fall off a bridge.

• no change in velocity

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NGSS.HS-PS2-1

Which of the following is/are true about acceleration

• Acceleration is defined as the rate of change of velocity

• Its SI unit is m/s2

• Negative acceleration is called retardation

• none of the following

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A bus starts from rest and accelerates to 14 m/s in 4 s. What is the average acceleration of the bus?

• 3.5 m/s2

• 5.9 m/s2

• 10.5 m/s2

• 24 m/s2

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NGSS.HS-PS2-1

Which of the following objects is accelerating?

• A car driving in a northwest at a constant speed of 35 mph.

• A car driving southwest at a constant speed of 35 mph.

• A car driving in a circle at a constant speed of 35 mph.

  Back

• A car driving south at a constant speed of 45 mph.

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