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A car’s velocity increases from 40 to 50 km/h in 10 s. What is its acceleration?

2.78 $\mathrm{m} / \mathrm{s}^{2}$

Physics 101 Mechanics

Chapter 3

Linear Motion

Motion Along a Straight Line

Motion in 2d or 3d

Newton's Laws of Motion

Gabriella K.

March 22, 2022

Express 0.009 in its millimeter equivalent

Cornell University

University of Washington

Hope College

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right. So, amigo, acceleration is basically how fast something speed changes. So the equation for that is acceleration is the change in velocity over a change in time. And basically, we just have to plug in the things that we know. So this is Ah, the ending velocity or the velocity of time too minus starting velocity or the velocity of time. One divided by how much time that takes. So he said it was 50 a za smiles or kilometers kilometers 50 um, kilometers per hour. 00 Um oh, uh, minus 40 kilometers per hour. It happens in 10 seconds. Okay, so basically, we have 50 minus forties, 10 kilometers per hour per 10 seconds. Sophie, subtract all that out. We have our first RV. It's attract 44 50 in the dry, but 10 we're left with one kilometer Kurt per hour per second. If we were to put this in more standard units, we could do some dimensional. Alice is to put this in either kilometers per hour squared or kilometers per second squared. Oh, and I guess we should probably do that. So in order to do that. So this this here what? We have is a perfectly correct answer, but we could make it more conventional by changing some units around. So we can either change the seconds in powers or the hours into seconds. And when we do, that is say, okay, we multiply it by, um, Roy, I totally didn't mean to make that line right there. We can multiply it by, um, the fact that every hour has 3000 600 seconds per one. Our what we're doing, we multiply this number, we can do that. And the reason we can do that is because 3600 seconds is equal to one hour. So we're really just multiplying by one. And then we have here. You have a cancellation. You can see that this seconds on top. Cancel It cancels with this seconds on bottom, and we can multiply that out. And this is then, um, 36 100 uh, kilometers per hour per hour. Work per hour. No. Started me to write that. Cross you there or per hour. Squirt

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