The statement "An object at rest remains at rest. An object in motion remains in motion unless acted upon by an outside force." describes Newton's First Law of Motion.
So the correct response is:
First Law of Motion
An object at rest remains at rest. An object in motion remains in motion unless acted upon by an outside force. This describes which of Newton’s Laws of Motion?(1 point)
Responses
First Law of Motion
First and Third Laws of Motion
First and Third Laws of Motion
Second and Third Laws of Motion
Second and Third Laws of Motion
Second Law of Motion
Second Law of Motion
11 answers
The picture shows a physics lab setup.
Why does the disk fall straight down into the glass when the index card is quickly pulled away from the glass in a horizontal direction?
(1 point)
Responses
Static friction
Static friction
Equilibrium
Equilibrium
Inertia
Inertia
Kinetic friction
Kinetic friction
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Why does the disk fall straight down into the glass when the index card is quickly pulled away from the glass in a horizontal direction?
(1 point)
Responses
Static friction
Static friction
Equilibrium
Equilibrium
Inertia
Inertia
Kinetic friction
Kinetic friction
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The reason the disk falls straight down into the glass when the index card is quickly pulled away is due to inertia. Inertia is the tendency of an object to resist changes to its state of motion. In this case, the disk remains at rest relative to the glass while the card is being pulled away, and when the card is removed, the disk's inertia causes it to continue downward into the glass.
So the correct response is:
Inertia
Suppose 25 children who weigh the same are playing a game of tug-of-war. Five children pull with 10 newtons of force, while ten children pull with 15 newtons of force in the opposite direction. How can one determine the net force on the rope?(1 point)
Responses
The forces are in the same direction, so the newtons can be added.
The forces are in the same direction, so the newtons can be added.
The forces are in opposite directions, so the newtons can be subtracted.
The forces are in opposite directions, so the newtons can be subtracted.
The forces are in opposite directions, so the newtons can be divided.
The forces are in opposite directions, so the newtons can be divided.
The newtons are in the same direction, so the newtons can be multiplied.
The newtons are in the same direction, so the newtons can be multiplied.
Responses
The forces are in the same direction, so the newtons can be added.
The forces are in the same direction, so the newtons can be added.
The forces are in opposite directions, so the newtons can be subtracted.
The forces are in opposite directions, so the newtons can be subtracted.
The forces are in opposite directions, so the newtons can be divided.
The forces are in opposite directions, so the newtons can be divided.
The newtons are in the same direction, so the newtons can be multiplied.
The newtons are in the same direction, so the newtons can be multiplied.
To determine the net force on the rope in a tug-of-war scenario, we need to consider that the forces are acting in opposite directions. Therefore, we can subtract the forces applied by each side to find the net force.
In this situation:
- Five children pull with 10 newtons each: \( 5 \times 10 = 50 \) newtons.
- Ten children pull with 15 newtons each: \( 10 \times 15 = 150 \) newtons.
Since these forces act in opposite directions, you would subtract the smaller force from the larger force:
\[ \text{Net Force} = 150, \text{N} - 50, \text{N} = 100, \text{N} \] (toward the direction of the greater force).
So the correct response is:
The forces are in opposite directions, so the newtons can be subtracted.
The graph above shows an object’s motion. Which statement is true?
(1 point)
Responses
The object accelerates at an increasing rate followed by a decreasing rate.
The object accelerates at an increasing rate followed by a decreasing rate.
The object starts at rest and then accelerates at a constant rate.
The object starts at rest and then accelerates at a constant rate.
The object does not move.
The object does not move.
The object accelerates at an increasing rate.
The object accelerates at an increasing rate.
(1 point)
Responses
The object accelerates at an increasing rate followed by a decreasing rate.
The object accelerates at an increasing rate followed by a decreasing rate.
The object starts at rest and then accelerates at a constant rate.
The object starts at rest and then accelerates at a constant rate.
The object does not move.
The object does not move.
The object accelerates at an increasing rate.
The object accelerates at an increasing rate.
Since I can't see the graph you're referring to, I can offer some guidance based on common interpretations of motion graphs. Here are some points to consider for your question:
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If the graph shows a curve that gets steeper over time: This typically indicates that the object accelerates at an increasing rate.
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If the graph shows a straight line with a positive slope beginning from the origin: This typically indicates that the object starts at rest and then accelerates at a constant rate.
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If the graph is a horizontal line: This typically means the object does not move.
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If the graph shows a curve that starts steep and then levels off: This usually suggests that the object accelerates at a decreasing rate.
Based on these interpretations, review the graph in question to determine which statement best matches the depicted motion. If you can provide a description of the graph, I can help you analyze it further!
The graph below shows a car’s motion.
Which statement is true?
(1 point)
Responses
The total time spent was 45 minutes.
The total time spent was 45 minutes.
The car never slowed down.
The car never slowed down.
The car’s speed was not constant.
The car’s speed was not constant.
The car traveled back to its starting point.
The car traveled back to its starting point.
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Which statement is true?
(1 point)
Responses
The total time spent was 45 minutes.
The total time spent was 45 minutes.
The car never slowed down.
The car never slowed down.
The car’s speed was not constant.
The car’s speed was not constant.
The car traveled back to its starting point.
The car traveled back to its starting point.
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Without being able to see the graph, I can help you evaluate the statements based on common scenarios in motion graphs. Here’s how you can determine which statement is true:
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The total time spent was 45 minutes. - If the x-axis of the graph represents time and shows a total of 45 minutes, then this statement would be true.
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The car never slowed down. - If the graph consistently shows a positive slope (indicating continuous acceleration) without leveling off or decreasing, then this statement would be true. If you see any segments of the graph where the slope decreases, this means the car is slowing down.
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The car’s speed was not constant. - If the graph has segments with varying slopes (some areas steeper, some less steep), this indicates that the speed was changing. If the slope remains constant the entire time, then this statement would be false.
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The car traveled back to its starting point. - If the graph goes up (indicating forward motion) and then comes back down to its starting point on the vertical axis (indicating it has returned), then this statement would be true. If the graph remains positive throughout, the car did not return to its starting point.
Based on your observations, please evaluate the graph to determine which statement is true! If you can provide any specific details about the graph, I’d be happy to help further analyze it.
To measure average speed, what data is required?(1 point)
Responses
The distance traveled and the time spent
The distance traveled and the time spent
The direction and the distance of travel
The direction and the distance of travel
The weight of the bike and the time spent
The weight of the bike and the time spent
The direction of travel and the weight of the bike
Responses
The distance traveled and the time spent
The distance traveled and the time spent
The direction and the distance of travel
The direction and the distance of travel
The weight of the bike and the time spent
The weight of the bike and the time spent
The direction of travel and the weight of the bike
To measure average speed, the required data is:
The distance traveled and the time spent.
Average speed is calculated using the formula:
\[ \text{Average Speed} = \frac{\text{Distance}}{\text{Time}} \]
Thus, the correct response is:
The distance traveled and the time spent.