The current produced by electromagnetic induction is greater when...
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Answer:
The total work that the rope does to Mangnus is - 5780 Jules.
Explanation:
By definition, the work is defined as:
Where F and d are the force and the total displacement. Note that in the definition the product is a scalar product since F and d are both vectors.
Take into account that according to third Newton's law the force that the rope does to Magnus is opposite to the force that Magnus does to the rope, therefore the scalar product will be negative due the rope's force goes against to Magnus displacement.
For calculating the work, we take 2500 N as the value for the force and 2.312 meters as the value for the displacement:
The ball is accelerating
Explanation:
On a distance-time graph, the slope of the graph represents the speed of the object represented.
Let's therefore calculate the slope (so, the speed of the ball) in the two intervals given.
In the first second, we have:
So the average speed is
In the next second, we have:
So the average speed is
We notice that the speed of the ball has increased from 20 m/s in the first second to 40 m/s in the next second: this means that the speed of the ball is increasing, and therefore, the ball is accelerating.
Learn more about acceleration:
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