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Problem 4 Easy Difficulty

In the amusement park ride known as Magic Mountain Superman, powerful magnets accelerate a car and its riders from rest to 45 $\mathrm{m} / \mathrm{s}$ (about 100 $\mathrm{mi} / \mathrm{h} )$ in a time of 7.0 $\mathrm{s}$ . The combined mass of the car and riders is $5.5 \times 10^{3} \mathrm{kg}$ . Find the average net force exerted on the car and riders by the magnets.

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Video Transcript

this question the cars and the passengers off the magic moment. Super men are accelerated from the equals. Zero to e V equals 45 meters per second. You know, only seven seconds. The mask off the magic molding Superman cars and writers is the question 5.5 times 10 to the 30 kilograms. We have to remind what is the average that force that fact on the car. So in order to do that, we begin my Coakley oil exploration off these cars. So remember that declaration is it goes to the variation off the velocity, divided by the time it takes to high right that velocity. Then the variation of the velocity goes to 45 minus zero and the time it takes, they ain't about time because 27 minus zero. So we have 45 divided by seven, and this is the acceleration off the right. Now that we have declaration, we can use Newton's second long to complete what is the next Force two by using Newton's second law because following the net force any requests to the mass time declaration and then we get that the net force is it just applies 25 times, 10 to the third times 45 divided by seven. Did you give her the net? Force off approximately 35 times? 10 to the third, which can be read in US 3.5 Time Stan uniform new toes.