G8.1 Acceleration quiz

Which of the following describe an object that is accelerating?

You can choose more than 1 correct answer.

• A basketball sits motionless on the gym floor

• A hockey puck slows down as it hits the net

• A soccer ball travels at a constant speed of 3 m/s

• A  bird begins flying from a tree 100 km to the northeast with its flock

Answer explanation

Acceleration is the change in speed or the change in direction. It includes speeding up, slowing down, or turning.

An image of a cue ball striking the surface of a pool table is shown.

Choose which 3 of the following describe the acceleration of the cue ball.

• the ball changed direction when it hit the side of the table

• the ball traveled at 30 cm/s while it was moving

• the ball was at rest until it was struck by the pool cue

• the ball eventually came to a stop due to friction

  ▲

Answer explanation

Acceleration is the change in speed or the change in direction. It includes speeding up, slowing down, or turning.

Which of the following graphs displays the data of an object that is at a constant speed?

• 
• 
• 
• 

Answer explanation

On motion graphs (distance/time) a diagonal straight line shows constant speed, A horizontal line shows no motion (no change in distance over time) and a curve line shows acceleration (whether it's an increase or decrease in speed).

Which color line represents the motion is speeding up?

• blue

• Green

• red

Answer explanation

On motion graphs (distance/time) a diagonal straight line shows constant speed, A horizontal line shows no motion (no change in distance over time) and a curve line shows acceleration (whether it's an increase or decrease in speed). If the diagonal straight line is going up to the right the object is moving away from straight if it is going down and to the right the object is moving towards the start. 

What kind of acceleration is shown here?

• positive
• negative
• none
• varies

Which section of the graph shows acceleration?

• AB
• BC
• EF
• FG

What is happening in this graph from point B to C? This is a SPEED-TIME GRAPH !! Look CAREFULLY !

(a)  

• The object is slowing down.
• The object is going down a hill.
• The object is returning to its starting location.
• The object is staying still.

A roller coasters accelerates from an initial velocity of 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.MS-PS2-2

A running horse increases his speed from 15 m/s to 42 m/s at an acceleration of 9 m/s². How long did this take the horse?

• 5 s

• 4 s

• 6 s

• 3 s

Tags

NGSS.HS-PS2-1

Dorothy was initially at rest. She sped up to 9 m/s in 24 seconds. What was her acceleration?

• 2.7 m/s²

• -2.7 m/s²

• -0.375 m/s²

• 0.375 m/s²