Balanced & Unbalanced Forces

Question 1

When the forces acting on a moving toy car are balanced, what will happen to the car’s motion?

Accepted Answer

It will keep moving at the same speed.

Answer

It will slow down and stop.

Answer

It will change direction.

Answer

It will speed up.

Question 2

Sam places a small toy car on a flat table. He pushes the car gently from the left with a force of 2 N. At the same time, he pushes the car from the right with a force of 2 N in the opposite direction. What will happen to the car's motion?

Accepted Answer

The car will stay at rest because the forces are balanced.

Answer

The car will move to the right because the pushes cancel and the car goes in the direction of the larger force.

Answer

The car will speed up in the direction of the pushes because any push makes it move faster.

Answer

The car will move to the left because the left push was applied first.

Question 3

Mia wants to discover how the strength of a push changes how far a wooden block slides on a kitchen floor. Which of the following experiment plans would give her a fair test?

Accepted Answer

Push the block with a light, medium, and hard shove, each time starting from the same spot on the same smooth floor, and record the sliding distance.

Answer

Push the block with a light, medium, and hard shove, but start from a different spot on the floor for each push, then record the distance.

Answer

Give the block a light push and only time how long it rolls before stopping, without measuring how far it goes.

Answer

Use the same hard shove each time but replace the block with a heavier one for the second trial, and note the distance it slides.

Try three questions

When the forces acting on a moving toy car are balanced, what will happen to the car’s motion?

Sam places a small toy car on a flat table. He pushes the car gently from the left with a force of 2 N. At the same time, he pushes the car from the right with a force of 2 N in the opposite direction. What will happen to the car's motion?

Mia wants to discover how the strength of a push changes how far a wooden block slides on a kitchen floor. Which of the following experiment plans would give her a fair test?

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