Calculating Speed, Distance, Net Force

The teacher instructs her students to return the books closest to them back to the shelf. Neither Jennifer nor Brianna wants to take the book, seen below, back to the shelf. Being in the exact middle, they begin to push the book back and forth to force it on the other’s side. Who will be forced to return the book, and what will be the resultant net force? (SC.6.P.13.3)

• Brianna and 2 N

• Brianna and 38 N

• Jennifer and 2 N

• Jennifer and 38 N

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Four forces are acting on a box, as shown to the right. What best explains the motion of the box? (SC.6.P.13.3)

• upward and to the right

• downward and to the right

• upward and to the left

• downward and to the left

Tags

NGSS.MS-PS2-2

Which surface will produce the least amount of friction? (SC.6.P.13.3)

• gravel running track

• smooth glass tabletop

• grassy soccer field

• carpet

An example of balanced forces is _______________. (SC.6.P.13.3)

• a person skating back and forth on an ice rink.

• a tire with treads gaining speed

• two soccer players running in opposite directions

• a book resting on a desk

If a car travels 150 km in 2 hours, what is its average

speed? (SC.6.P.13.3)

• 300 km/hr

• 75 km/hr

• 100 km/hr

• 150 km/hr

You are riding in a car and the driver presses harder on

the gas pedal, causing an increase in speed. This is an example of ___________________. (SC.6.P.13.3)

• velocity

• positive acceleration

• constant speed

• negative acceleration

Which of the following accurately contrasts velocity and speed? (SC.6.P.13.3)

• Speed is distance traveled in a certain amount of time. Velocity is time traveled in a certain distance.

• Speed is distance traveled in a certain amount of time. Velocity is speed in a specific direction.

• Velocity is distance traveled in a certain amount of time. Speed is velocity in a specific direction.

• Velocity is distance traveled in a certain amount of time. Speed is how fast you’re going.

You can increase the friction by…(SC.6.P.13.3)

• making the surfaces rougher

• using oil or another lubricant

• putting the object on wheels

• asking a friend to help push or pull

What is the net force of the box, and which direction will it move? (SC.6.P.13.3)

• 50 Newtons to the right

• 50 Newtons to the left

• 100 Newtons to the left

• 0 Newtons, will not move

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

According to the graph, over which segments is the car demonstrating positive or negative acceleration? (SC.6.P.13.3)

• a & c

• b & d

• b & d & e

• a & c & e

Tags

NGSS.MS-PS3-1