Question

andrew plays trumpet in the concert band. he holds the trumpet still at his side until it is time for him to play. when it is time, he brings the trumpet up to his mouth and starts to play. which statement correctly connects the motion of the trumpet with newtons first law of motion? a. a tuba has more mass than a trumpet, so it has greater inertia. b. the trumpet automatically stops moving without a force acting on it. c. the trumpet starts moving because a net force overcomes the trumpets inertia. d. andrew exerts an action force on the trumpet, and the trumpet exerts a reaction force on andrew.

Explanation:

Newton's first law states that an object at rest stays at rest and an object in motion stays in motion unless acted upon by a net external force. Inertia is the tendency of an object to resist changes in its state of motion.

• Option A: Compares inertia of different objects (tuba and trumpet) but doesn't connect to the motion of the trumpet in the given scenario (trumpet moving from rest).
• Option B: Contradicts Newton's first law. An object doesn't stop moving without a force (friction, etc. are forces).
• Option C: When Andrew moves the trumpet (applies a force), the net force overcomes the trumpet's inertia (tendency to stay at rest) and it starts moving. This correctly connects the motion of the trumpet with Newton's first law.
• Option D: Relates to Newton's third law (action - reaction) not the first law.

Answer:

C. The trumpet starts moving because a net force overcomes the trumpet's inertia.