Evidence of Balanced and Unbalanced Forces

A wheeled cart is moving to the right at a constant speed.  Two forces of equal magnitude are acting upon the cart. Which of the following best describes the forces and motion of the cart?

• Balanced Forces, Constant Speed

• Balanced Forces, Acceleration

• Unbalanced Forces, Constant Speed

• Unbalanced Forces, Acceleration

Tags

NGSS.MS-PS2-2

In a tug of war the left team pulls with a force of 200N. The right team pulls with a force of 150N. What is the resultant force?

• 50N to the left.

• 350N to the left.

• 350N to the right.

• 50N to the right.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Which of the blocks above has balanced forces acting on it?

• A

• B

• C

• D

An airplane is travelling North through the sky at a constant speed when turbulence causes it to take a different route, changing its direction. Explain the forces at work on this plane.

• Unbalanced, because the plane is moving forward, not backwards

• Unbalanced, because the speed is constant and there is a change in direction

• Balanced, because the plane is not falling to a lower altitude

• Unbalanced, because the plane is in motion

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

How will this object move? 

• It won't move. 

• It will move to the right. 

• It will move to the left. 

• It will move up. 

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

If an object is not moving the forces acting upon it are _____________

• unbalanced

• weak

• balanced

• Hulk Smash!

Are the forces acting on the sled in Section 1 balanced or unbalanced? The track is smooth and frictionless.

• Balanced

• Unbalanced

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Are the forces acting on the sled in Section 2 balanced or unbalanced? The track is smooth and frictionless.

• Balanced

• Unbalanced

Tags

NGSS.MS-PS2-2

Students are playing tug-of-war. If group B pulls the rope to the right with a force of 400 N and group A pulls the rope to the left with a force of 250 N, what will happen to the ribbon in the middle of the rope?

• The ribbon will move to the left and group A will win the tug-of-war.

• The ribbon will move to the left and group B will win the tug-of-war.

• The ribbon will move to the right and group B will win the tug-of-war.

• The ribbon will move to the right and group A will win the tug-of-war.

Tags

NGSS.MS-PS2-1

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