Force: Bal vs Unbal Forces

Daniel and Lily are pushing a car together. The combination of all of the forces they exert on the car

• Net Force

• Force

• 
  Inertia

• Gravity

Tags

S8P3.b

Arjun and Maya are organizing a tug-of-war game at a school event. In one team, five children each pull with 5 newtons of force. In the opposing team, ten children each pull with 10 newtons of force. How can one determine the net force on the rope?

• The forces are in the same direction, so the newtons can be added.

• 
  The forces are in opposite directions, so the newtons can be divided.

• 
  The forces are in opposite directions, so the newtons can be subtracted.

• The newtons are in the same direction, so the newtons can be multiplied.

Tags

S8P3.b

Anika and Priya are trying to slide a heavy box across the floor. Friction is defined as

• a change in the direction of two objects in nature.

• the resistance to a change in the speed of an object.

• the force that is required to stop and start an object at rest.

• a force between two touching surfaces that opposes motion.

Tags

S8P3.b

Samuel is pushing a box with a force of 8 N to the right, while David is pushing it with a force of 14 N to the left. What will happen to the movement of the box when an additional 10 N of force is added on the right?

• The box will move upward.

• The box will move to the left.

• The box will move downward.

• The box will move to the right.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Abigail and Aiden are playing tug-of-war with a box. Which statement best describes the motion of the box when they pull on it?

• The box will move to the left because the forces are balanced.

• The box will move to the right because the forces are balanced.

• The box will move to the left because the forces are unbalanced.

• The box will move to the right because the forces are unbalanced.

Tags

NGSS.MS-PS2-2

Luna and Nora are trying to move a heavy box to the right. Which statement best describes the forces required to move the box?

• The forces must be balanced with the force from the left greater than the force from the right.

• The forces must be balanced with the force from the right greater than the force from the left.

• The forces must be unbalanced with the force from the left greater than the force from the right.

• The forces must be unbalanced with the force from the right greater than the force from the left.

Tags

NGSS.MS-PS2-2

Nora tries to push a car that has run out of gas on the side of the road. As much as she tries, she can not get the car to move. Which statement best describes why the car is not moving?

• Nora did not apply enough force to the car and so the forces are unbalanced.

• 
  Nora did not apply enough force to the car and so the forces are still balanced.

• Nora applied too much force to the car and now the forces on the car are balanced.

• Nora applied too much force to the car and now the forces on the car are unbalanced

Tags

NGSS.MS-PS2-2

Which diagram best shows the forces which need to be added to balance the box?

• 
• 
• 
• 

Tags

S8P3.b

Evelyn and Aiden are playing tug-of-war. Evelyn pulls with a force of 10 N towards the north, while Aiden pulls with a force of 2 N towards the south. The net force on the rope is

• 8 N south.

• 12 N south.

• 20 N south.

• 8 N North.

Tags

S8P3.b

Isla and Kai are conducting an experiment with two diagrams, A and B. In diagram A, the two spring scales have been stretched until each reads 10 N, the wheels of the cart are almost frictionless wheels, and the cart is at rest. In diagram B, the pull toward the left has been replaced by a block fastened rigidly to a table, and the pull to the right has stretched the spring scales until the one on the right again reads 10 N, and the cart is at rest. What is the magnitude of the force between cart B and the block?

• 0 N

• 5 N

• 10 N

• 20 N

Tags

S8P3.b