Question

which law is it? choose the answer
a sports car speeds up much faster than a dump truck when the traffic light turns from red to green
1 2 3
when a mule stops suddenly, the packages on its back continue to move forward onto the ground
1 2 3
a skateboarder pushed the ground backwards which causes the board to move forward
1 2 3

Explanation:

To solve this, we analyze each scenario with Newton's Laws:

Scenario 1: Sports Car vs. Truck Acceleration

• Law: Newton’s Second Law ($F = ma$ or $a=\frac{F}{m}$).
• Explanation: A sports car has less mass ($m$) than a truck. For the same engine force ($F$), acceleration ($a$) is inversely proportional to mass. So the car accelerates faster.

Scenario 2: Mule Stopping, Packages Move Forward

• Law: Newton’s First Law (Inertia).
• Explanation: Packages in motion tend to stay in motion (inertia) when the mule (their “support”) stops suddenly. They continue moving forward until friction/impact stops them.

Scenario 3: Skateboard Pushes Ground, Moves Forward

• Law: Newton’s Third Law (Action - Reaction).
• Explanation: The skateboard exerts a backward force on the ground (action). The ground exerts an equal - opposite forward force on the skateboard (reaction), moving it forward.

Final Answers (matching each scenario to the law):

1. Sports Car/Truck Acceleration: Newton’s Second Law ($F = ma$).
2. Mule/Packages: Newton’s First Law (Inertia).
3. Skateboard/Ground: Newton’s Third Law (Action - Reaction).

Answer:

To solve this, we analyze each scenario with Newton's Laws:

Scenario 1: Sports Car vs. Truck Acceleration

• Law: Newton’s Second Law ($F = ma$ or $a=\frac{F}{m}$).
• Explanation: A sports car has less mass ($m$) than a truck. For the same engine force ($F$), acceleration ($a$) is inversely proportional to mass. So the car accelerates faster.

Scenario 2: Mule Stopping, Packages Move Forward

• Law: Newton’s First Law (Inertia).
• Explanation: Packages in motion tend to stay in motion (inertia) when the mule (their “support”) stops suddenly. They continue moving forward until friction/impact stops them.

Scenario 3: Skateboard Pushes Ground, Moves Forward

• Law: Newton’s Third Law (Action - Reaction).
• Explanation: The skateboard exerts a backward force on the ground (action). The ground exerts an equal - opposite forward force on the skateboard (reaction), moving it forward.

Final Answers (matching each scenario to the law):

1. Sports Car/Truck Acceleration: Newton’s Second Law ($F = ma$).
2. Mule/Packages: Newton’s First Law (Inertia).
3. Skateboard/Ground: Newton’s Third Law (Action - Reaction).