Question

newtons first law of motion - 7.7d
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.
no motion unbalanced change in speed
change in direction balanced constant motion

Explanation:

To solve this, we analyze each scenario using Newton's First Law (balanced forces: constant motion/speed/direction; unbalanced forces: change in motion).

First Row (Driver at constant speed on straight highway):

• Force Type: Balanced (no change in motion).
• Motion Type: Constant motion (since speed and direction are constant).

Second Row (Driver switches lanes to exit):

• Force Type: Unbalanced (changing direction requires unbalanced force).
• Motion Type: Change in direction (switching lanes means direction changes).

Third Row (Driver steps on brakes to avoid crash):

• Force Type: Unbalanced (braking changes speed, so unbalanced force).
• Motion Type: Change in speed (braking reduces speed, so speed changes).

Filling the Table:

Scenario	Force Type	Motion Type
A driver switches lanes to prepare to exit	Unbalanced	Change in direction
A driver steps on the brakes to avoid a crash	Unbalanced	Change in speed

(If the task was to match the motion types to the empty boxes, the answers for the empty boxes would be:

1. Constant motion
2. Change in direction
3. Change in speed)

Answer:

To solve this, we analyze each scenario using Newton's First Law (balanced forces: constant motion/speed/direction; unbalanced forces: change in motion).

First Row (Driver at constant speed on straight highway):

• Force Type: Balanced (no change in motion).
• Motion Type: Constant motion (since speed and direction are constant).

Second Row (Driver switches lanes to exit):

• Force Type: Unbalanced (changing direction requires unbalanced force).
• Motion Type: Change in direction (switching lanes means direction changes).

Third Row (Driver steps on brakes to avoid crash):

• Force Type: Unbalanced (braking changes speed, so unbalanced force).
• Motion Type: Change in speed (braking reduces speed, so speed changes).

Filling the Table:

Scenario	Force Type	Motion Type
A driver switches lanes to prepare to exit	Unbalanced	Change in direction
A driver steps on the brakes to avoid a crash	Unbalanced	Change in speed

(If the task was to match the motion types to the empty boxes, the answers for the empty boxes would be:

1. Constant motion
2. Change in direction
3. Change in speed)