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 flufy87 Posts: 3, Reputation: 1 New Member #1 Mar 7, 2011, 04:09 PM
solid mechanics
How long must a force F be applied to a mass M to change the velocity of the mass by 2 m/s if

· F = 1471 N

· M = 153 kg

 jcaron2 Posts: 986, Reputation: 204 Senior Member #2 Mar 7, 2011, 09:13 PM

You know that F=ma.

Therefore, you can easily calculate the acceleration.

Once you know the acceleration, a, you just need to use

$\Delta v = a \cdot \Delta t$,

where $\Delta v$ is the change in velocity and $\Delta t$ is the amount of time that passes. All you have to do is solve for $\Delta t$.

Can you do that?

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