Net Force Review

Imagine David, Luna, and Elijah are playing a game of tug-of-war. They are trying to understand the concept of 'net force'. How would you explain it to them?

• The net force is the force exerted by one of them on the others.

• The net force is the force each of them exerts on themselves.

• The net force is the overall force acting on the rope they are pulling.

• The net force is the force exerted by the one who is running.

Answer explanation

The net force is the overall force acting on the rope they are pulling.

Mia, Lily, and Scarlett are having a friendly competition to see who can push a box the furthest. They each push the box with different forces. How would you calculate the net force acting on the box?

• Add up all the individual forces Mia, Lily, and Scarlett are applying on the box.

• Subtract all the individual forces Mia, Lily, and Scarlett are applying on the box.

• Divide all the individual forces Mia, Lily, and Scarlett are applying on the box.

• Multiply all the individual forces Mia, Lily, and Scarlett are applying on the box.

Answer explanation

To calculate the net force, add up the individual forces applied by Mia, Lily, and Scarlett on the box.

Ethan and Noah are having a debate about balanced forces. Ethan says, 'A balanced force is a force that is unequal in magnitude and opposite in direction to another force, resulting in no change in an object's motion.' Noah disagrees and says, 'No, a balanced force is a force that is equal in magnitude and opposite in direction to another force, resulting in no change in an object's motion.' Evelyn, who is listening to their debate, is confused. Can you help Evelyn figure out who is correct?

• Ethan is correct: A balanced force is a force that is unequal in magnitude and opposite in direction to another force, resulting in no change in an object's motion.

• Noah is correct: A balanced force is a force that is equal in magnitude and same in direction to another force, resulting in no change in an object's motion.

• Both are correct: A balanced force is a force that is equal in magnitude and opposite in direction to another force, resulting in a change in an object's motion.

• Noah is correct: A balanced force is a force that is equal in magnitude and opposite in direction to another force, resulting in no change in an object's motion.

Answer explanation

Noah is correct: A balanced force is a force that is equal in magnitude and opposite in direction to another force, resulting in no change in an object's motion.

Imagine Henry, Avery, and Aria are playing a game of tug-of-war. When would you say the forces they are exerting are balanced?

• The forces are balanced when the net force acting on the rope is zero, meaning no team is winning.

• The forces are balanced when the net force acting on the rope is positive, meaning Henry's team is winning.

• The forces are balanced when the net force acting on the rope is greater than zero, meaning Avery's team is winning.

• The forces are balanced when the net force acting on the rope is negative, meaning Aria's team is winning.

Answer explanation

The forces are balanced when the net force acting on the rope is zero, meaning no team is winning.

What is an unbalanced force?

• An unbalanced force is a force that only affects the shape of an object but not its motion.

• An unbalanced force is a force that does not cause any change in an object's motion or shape.

• An unbalanced force is a force that causes a change in an object's motion or shape.

• An unbalanced force is a force that has equal magnitude and opposite direction.

Answer explanation

An unbalanced force causes a change in an object's motion or shape.

When do unbalanced forces occur?

• Unbalanced forces occur when the net force acting on an object is equal to zero.

• Unbalanced forces occur when the net force acting on an object is not equal to zero.

• Unbalanced forces occur when there is no force acting on an object.

• Unbalanced forces occur when the net force acting on an object is greater than zero.

Answer explanation

Unbalanced forces occur when the net force acting on an object is not equal to zero.

Mia, Liam, and Daniel are playing a game of tug-of-war. Mia and Liam are on one team and they are pulling with forces of 5 N and 3 N respectively in the same direction. Can you help Daniel figure out the net force they are applying?

• 15 N

• 8 N

• 2 N

• 0 N

Answer explanation

The net force is the sum of the individual forces. Mia's force is 5 N and Liam's force is 3 N. Therefore, the net force is 8 N, which is the correct choice.

Priya and Maya are playing a game of tug-of-war. Priya pulls with a force of 8 N, while Maya pulls with a force of 4 N in the opposite direction. Can you figure out the net force in their game?

• 4 N

• 8 N

• 12 N

• 0 N

Answer explanation

The net force in their game is 4 N because the forces are in opposite directions and can be subtracted.

Aiden, Aria, and Evelyn are having a tug of war! Aiden is pulling with a force of 2 N, Aria with 3 N, and Evelyn with 4 N. If they all pull in the same direction, what is the total force they are applying?

• 5 N

• 6 N

• 7 N

• 9 N

Answer explanation

The total force they are applying is 9 N because Aiden, Aria, and Evelyn are pulling in the same direction and their forces add up.

Elijah and Aria are playing a game of tug-of-war. Elijah pulls with a force of 6 N, while Aria pulls with a force of 2 N in the opposite direction. Can you help Nora figure out the net force?

• 8 N

• 4 N

• 2 N

• 0 N

Answer explanation

The net force is calculated by subtracting the force in the opposite direction from the force in the desired direction. In this case, 6 N - 2 N = 4 N. Therefore, the net force is 4 N, which is the correct choice.