Acceleration Quizizz

What is acceleration defined as?

• Change in velocity divided by the time for the change to occur

• Change in speed divided by the distance covered

• Change in direction divided by the time for the change to occur

• Change in velocity multiplied by the time for the change to occur

Why is acceleration considered a vector?

• Because it has only speed

• Because it has only direction

• Because it has both speed and direction

• Because it has neither speed nor direction

When does acceleration occur?

• Only when there is a change in speed

• Only when there is a change in direction

• When there is a change in speed, direction, or both

• Only when there is no change in speed or direction

What is positive acceleration?

• Acceleration and velocity in opposite directions

• Acceleration and velocity in the same direction

• Acceleration with no change in velocity

• Acceleration with decreasing speed

Tags

NGSS.MS-PS2-2

What happens if an object changes direction while maintaining constant speed?

• It decelerates

• It remains at rest

• It accelerates

• It stops

What is the formula for calculating acceleration?

• a = (v_f - v_i) / t

• a = (v_i - v_f) / t

• a = (v_f + v_i) / t

• a = (v_f * v_i) / t

What does the symbol $v_f$ represent in the acceleration formula?

• Initial velocity

• Final velocity

• Time

• Acceleration

What are the SI units for acceleration?

• m/s

• m/s²

• m²/s

• s/m²

A jet airliner starts at rest and moves down the runway. After 20 seconds, the airliner reaches a speed of 80 m/s. What is the airliner's acceleration?

• 4 m/s²

• 8 m/s²

• 2 m/s²

• 6 m/s²

Tags

NGSS.MS-PS2-2

A skateboarder is moving at a speed of 3 m/s and comes to a stop in 2 seconds. What is the skateboarder's acceleration?

• -1.5 m/s²

• 1.5 m/s²

• 0 m/s²

• -3 m/s²

Tags

NGSS.MS-PS2-2