D/T graph and V/T graph Practice

Which object(s) is(are) maintaining a state of motion (i.e., maintaining a constant velocity)? 

• A

• B

• C

• D

• E

Answer explanation

Objects A, B, D, and E are maintaining a state of motion (i.e., remaining with constant velocity) as demonstrated by the constant slope. If the slope is constant, then the velocity is constant.

Which object(s) is(are) accelerating? 

• A

• B

• C

• D

• E

Answer explanation

Object C is accelerating. An accelerating object has a changing velocity. The slope of a p-t graph equals the velocity. An accelerating object has a curved slope.

Tags

NGSS.HS-PS2-1

Which object(s) is(are) not moving? 

• A

• B

• C

• D

• E

Answer explanation

Objects A and E are not moving. An object which is not moving has a zero velocity. This means that a line with zero slope on a p-t graph has zero velocity.

On average, which object is traveling fastest? 

• A

• B

• C

• D

• E

Answer explanation

Object B is traveling fastest. The line on a p-t graph with the greatest slope has the greatest speed (or greatest magnitude of velocity).

Tags

NGSS.MS-PS3-1

On average, which moving object is traveling slowest? 

• A

• B

• C

• D

• E

Answer explanation

Object D is traveling slowest. The line on a p-t graph with the smallest slope has the smallest speed (or smallest magnitude of velocity).

Tags

NGSS.MS-PS3-1

Which object has the greatest acceleration? 

• A

• B

• C

• D

• E

Answer explanation

Object C has the greatest acceleration. It is the only object with an acceleration. Accelerated motion on a p-t graph is represented by a curved line.

Tags

NGSS.HS-PS2-1

Which object(s) is(are) maintaining its state of motion (constant)?

• A

• B

• C

• D

• E

Answer explanation

Objects A and E are maintaining their state of motion. To maintain the state of motion is to keep a constant velocity (i.e., to have a zero acceleration). A zero slope on a v-t graph means constant velocity.

Tags

NGSS.MS-PS3-1

Which object(s) is(are) accelerating?

• A

• B

• C

• D

• E

Answer explanation

Objects B and C are accelerating (and object D for the first part of the path). Asloped line means acceleration on a v-t graph.

Tags

NGSS.MS-PS2-2

Which object(s) is(are) moving?

• A

• B

• C

• D

• E

Answer explanation

Each of the objects are moving. If an object were not moving, then the v-t graph would be a horizontal line along the x-axis (v = 0 m/s).

Tags

NGSS.MS-PS3-1

Which object(s) change(s) its direction?

• A

• B

• C

• D

• E

Answer explanation

Objects B and C change their direction. An object that is changing its direction is changing velocity. So the line on a v-t graph will pass from the + to the - region or the - to + region of the graph to show changing direction. Object D is not changing its direction. Object D first moves in the - direction with increasing speed and then maintains a constant speed.