Question

move the answers to the correct boxes. a car sits still at a red light. a car travels at a constant speed of 60 mph along a straight section of highway. a driver switches lanes to prepare to exit. a driver steps on the brakes to avoid a crash.

Explanation:

To solve this, we analyze each scenario using the concepts of balanced and unbalanced forces (balanced forces result in no change in motion; unbalanced forces result in a change in motion like speeding up, slowing down, or changing direction).

Scenario 1: A car sits still at a red light.

• Forces Balanced or Unbalanced?: Balanced (given).
• Effect of Forces: Since balanced forces act, the car remains at rest (no change in motion).

Scenario 2: A car travels at a constant speed of 60 mph along a straight section of highway.

• Forces Balanced or Unbalanced?: Balanced (constant speed and straight path mean no acceleration, so forces are balanced).
• Effect of Forces: The car continues moving at a constant velocity (no change in speed or direction).

Scenario 3: A driver switches lanes to prepare to exit.

• Forces Balanced or Unbalanced?: Unbalanced (changing direction requires acceleration, so unbalanced forces act).
• Effect of Forces: The car changes its direction of motion (due to unbalanced forces causing acceleration).

Scenario 4: A driver steps on the brakes to avoid a crash.

• Forces Balanced or Unbalanced?: Unbalanced (given).
• Effect of Forces: The car slows down (decelerates) to avoid the crash (change in speed due to unbalanced forces).

Filling the Table:

Scenario	Forces Balanced or Unbalanced?	Effect of Forces
A car travels at a constant speed of 60 mph along a straight section of highway.	Balanced	The car continues moving at a constant velocity (no change in speed or direction).
A driver switches lanes to prepare to exit.	Unbalanced	The car changes its direction of motion.
A driver steps on the brakes to avoid a crash.	Unbalanced	The car slows down (decelerates).

Final Table Entries (matching the boxes):

• First row (car sits still) - Effect: The car remains at rest (no change in motion).
• Second row (constant speed) - Balanced/Effect: Balanced; The car continues moving at a constant velocity.
• Third row (switches lanes) - Balanced/Effect: Unbalanced; The car changes direction.
• Fourth row (brakes) - Effect: The car slows down (decelerates).

Answer:

To solve this, we analyze each scenario using the concepts of balanced and unbalanced forces (balanced forces result in no change in motion; unbalanced forces result in a change in motion like speeding up, slowing down, or changing direction).

Scenario 1: A car sits still at a red light.

• Forces Balanced or Unbalanced?: Balanced (given).
• Effect of Forces: Since balanced forces act, the car remains at rest (no change in motion).

Scenario 2: A car travels at a constant speed of 60 mph along a straight section of highway.

• Forces Balanced or Unbalanced?: Balanced (constant speed and straight path mean no acceleration, so forces are balanced).
• Effect of Forces: The car continues moving at a constant velocity (no change in speed or direction).

Scenario 3: A driver switches lanes to prepare to exit.

• Forces Balanced or Unbalanced?: Unbalanced (changing direction requires acceleration, so unbalanced forces act).
• Effect of Forces: The car changes its direction of motion (due to unbalanced forces causing acceleration).

Scenario 4: A driver steps on the brakes to avoid a crash.

• Forces Balanced or Unbalanced?: Unbalanced (given).
• Effect of Forces: The car slows down (decelerates) to avoid the crash (change in speed due to unbalanced forces).

Filling the Table:

Scenario	Forces Balanced or Unbalanced?	Effect of Forces
A car travels at a constant speed of 60 mph along a straight section of highway.	Balanced	The car continues moving at a constant velocity (no change in speed or direction).
A driver switches lanes to prepare to exit.	Unbalanced	The car changes its direction of motion.
A driver steps on the brakes to avoid a crash.	Unbalanced	The car slows down (decelerates).

Final Table Entries (matching the boxes):

• First row (car sits still) - Effect: The car remains at rest (no change in motion).
• Second row (constant speed) - Balanced/Effect: Balanced; The car continues moving at a constant velocity.
• Third row (switches lanes) - Balanced/Effect: Unbalanced; The car changes direction.
• Fourth row (brakes) - Effect: The car slows down (decelerates).