Question

question 1 - 9
directions: drag the answers to the correct boxes.
match each example with the law that best explains its motion.
marco realized that to jump
up higher on a trampoline,
he must push down harder.
1st law
of motion
a hockey puck, after being
hit, will continue to move in
the same direction it was
hit until a force acts on it.
2nd law
of motion
a large car needs a more
powerful engine than a
small car.
3rd law
of motion

Explanation:

• 1st Law of Motion (Law of Inertia): An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force. The hockey puck example ("A hockey puck, after being hit, will continue to move in the same direction it was hit until a force acts on it") fits this law as it shows an object maintaining its state of motion until an external force (like friction, air resistance, or another hit) acts on it.
• 2nd Law of Motion (\(F = ma\)): Force is equal to mass times acceleration (\(F=ma\)). The car example ("A large car needs a more powerful engine than a small car") relates to this law. Since \(F = ma\), for a given acceleration, a larger mass (mass of a large car > mass of a small car) requires a larger force (more powerful engine provides more force).
• 3rd Law of Motion (Action - Reaction): For every action, there is an equal and opposite reaction. The trampoline example ("Marco realized that to jump up higher on a trampoline, he must push down harder") is based on this law. When Marco pushes down on the trampoline (action force), the trampoline pushes back up on him (reaction force). The harder he pushes down (greater action force), the greater the reaction force that propels him up.

Answer:

• "A hockey puck, after being hit, will continue to move in the same direction it was hit until a force acts on it" → 1st Law of Motion.
• "A large car needs a more powerful engine than a small car" → 2nd Law of Motion.
• "Marco realized that to jump up higher on a trampoline, he must push down harder" → 3rd Law of Motion.