- #1

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F=ma

(30000m/s^2)(0.15kg) = 4500 N

Can someone make sense out of these problems? How is it accelerating at that rate? I've seen car crashing problems not even get that much higher force. Sosa can hit a car and get a home run. LOL

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- Thread starter Physics1
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- #1

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F=ma

(30000m/s^2)(0.15kg) = 4500 N

Can someone make sense out of these problems? How is it accelerating at that rate? I've seen car crashing problems not even get that much higher force. Sosa can hit a car and get a home run. LOL

- #2

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Can anyone explain it? I'm assuming all the problems in the packet come to realistic answers.

- #3

Doc Al

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The time of contact of bat with ball is very short--so force and acceleration are high.Can someone make sense out of these problems? How is it accelerating at that rate?

A car has quite a bit more mass than a baseball. (And is not as bouncy.)I've seen car crashing problems not even get that much higher force. Sosa can hit a car and get a home run.

- #4

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Here's another problem...

An ax has a mass of 2.5kg and is swinging at 25m/s.

A man chops a tree and the ax stops at 2.3cm in the tree.

(vf^2 - vi^2)/2d = a

625m/s / 0.046m = 13000m/s^2

F=ma

(13000m/s^2)(2.5kg) = 34000 N

So how is that person so strong? A car can make a much bigger dent to another car than a man can do with a hammer. The force values never make any sense.

An ax has a mass of 2.5kg and is swinging at 25m/s.

A man chops a tree and the ax stops at 2.3cm in the tree.

(vf^2 - vi^2)/2d = a

625m/s / 0.046m = 13000m/s^2

F=ma

(13000m/s^2)(2.5kg) = 34000 N

So how is that person so strong? A car can make a much bigger dent to another car than a man can do with a hammer. The force values never make any sense.

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