I need help explaining this to my nephew. Please helpand be detailed, I have to

Question

I need help explaining this to my nephew. Please helpand be detailed, I have to understand it enough to explain it to a12 year old. A kangaroo hops 60 m to the east in 5 s. use this informationto answer the following questions. a. What is the kangaroo's average speed? b. What is the kangaroo's average velocity? c. The kangaroo stops at a lake for a drink of water andthen starts hopping again to the south. each second, thekangaroo's velocity inceases 2.5 m/s. What is the kangaroo'sacceleration after 5 s? I need help explaining this to my nephew. Please helpand be detailed, I have to understand it enough to explain it to a12 year old. A kangaroo hops 60 m to the east in 5 s. use this informationto answer the following questions. a. What is the kangaroo's average speed? b. What is the kangaroo's average velocity? c. The kangaroo stops at a lake for a drink of water andthen starts hopping again to the south. each second, thekangaroo's velocity inceases 2.5 m/s. What is the kangaroo'sacceleration after 5 s?

Explanation / Answer

a) We are looking for an average speed. The key word isaverage. That means that we do not care about differentspeeds, we just need to know how far he went and how long ittook. Since the kangaroo went 60m in 5s; we just use thosefinal results and divide. Looking at the units, we know weneed to divide the distance by the time. As such, we willarrive at an answer of 12m/s as the average speed. b) The only difference between speed and velocity is that speed isthe magnitude of velocity. In other words speed is just anumber while velocity is a number AND a direction. Therefore,the average velocity will be 12m/s to the east. Notice themagnitude is the same as the speed, but now we include the extrainformation given about the direction. c) This is kind of a trick question. The time after does notmatter. The velocity increases at 2.5 m/s at every second,whether it is 1 second later, 5 seconds later, or 10 seconds later;the information just says it keeps increasing. Therefore, theacceleration at 5s, or at any time for that matter, is simply2.5m/s^2. Notice the denominator has units of seconds squaredbecause the kangaroo increases its velocity at 2.5 meters persecond per second. Hope this helps, good luck!

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