8.6a

Which of the following objects will experience an unbalanced force?

• A bike rider on a smooth and level road, pedaling at a constant rate.

• A train pulling on another train, each with the same amount of force.

• A chair sitting on the floor with balanced forces acting in opposite directions.

• A ball rolling across the floor with friction acting in the opposite direction.

Tags

NGSS.MS-PS2-2

According to Newton’s Law of Inertia, an object that is moving will change its motion only if what kinds of forces act on it?

• Constant forces

• Unbalanced forces

• Unbalanced forcesStrong forces

• Gravitational forces

Tags

NGSS.MS-PS2-2

You and your dad are moving the couch from one side to another. Your dad pushes with a force of 35 N to the right and you push with a force of 25 N right. What is the net force on the couch?

• 60 N right

• 10 N left

• 60 n right

• 50 N left

Tags

NGSS.MS-PS2-2

What is the net force?

• 40 N left

• 0 N Balalnced

• 400 N right

• 40 N right

Tags

NGSS.MS-PS2-2

Are forces balanced or unbalanced when a car is moving at a constant speed in a straight line?

• Balanced

• Unbalanced

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Why is person B having a hard time moving down the hill?

• Person B has more friction than person A.

• Person B has the same friction as person A.

• Person B is out of shape.

• Person B has less friction has person A.

Which of the following conclusions is based on the data in the table?

• There is no pattern between balanced and unbalanced forces

• Balanced forces are equal and opposite in direction, while unbalanced forces are different sizes in the same or opposite directions

• Forces are always equal and opposite in direction for both balanced and unbalanced forces

• Balanced forces are different sizes in the same or opposite direction, while unbalanced forces are equal and opposite in direction

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-5

A group of students determines how much force it will take to move a 0.1 kg disk. They pull the disk across different surfaces using a spring scale. The results are recorded above. With what acceleration did the disk move across the concrete?

• 23 m/s²

• 33.5 m/s²

• 67 m/s²

• 91 m/s²

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

According to the picture, what will happen to the motion of the toy truck?

• The toy truck will stay in place

• The toy truck will move left with a force of 16 N

• The toy truck will move right with a force of 4 N

• The toy truck will move right with a force of 16 N

Tags

NGSS.MS-PS2-2

A group of students applies different amounts of force to toy vehicles while investigating changes in the speed of the toy. Which piece of equipment would measure the force applied to the toy vehicle in each trial?

• Psychrometer

• Spring scale

• Balance

• Spectroscope