Calculating Speed after Impulse of 6 Ns

In summary, the conversation revolved around a 2kg object moving to the right with a speed of 4 m/s and experiencing an impulse of 6 Ns. The individual initially calculated the change in momentum incorrectly, but was able to correct it and determine the final velocity to be 7 m/s.
  • #1
kerbyjonsonjr
34
0

Homework Statement


A 2kg object is moving to the right with a speed of 4 m/s when it experiences an impulse of 6 Ns .


Homework Equations



mv+mv=mv

The Attempt at a Solution


Since the impulse is just the change in momentum I put in 2(4)+2v=6 so wouldn't v be -1?
 
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  • #2
hi kerbyjonsonjr! :wink:

(btw, which direction is the impulse?)
kerbyjonsonjr said:
Since the impulse is just the change in momentum …

yes that's correct :smile:
… I put in 2(4)+2v=6 so wouldn't v be -1?

what is 2(4)+2v=6 supposed to be? :confused:

the impulse is the difference between the momentum after and before …

try again :smile:
 
  • #3
got it now! thanks for the help! I messed up. It should have been the final minus the initial. So it's 2v-2(4)=6 which gets me v= 7 m/s. Thanks for the help!
 

FAQ: Calculating Speed after Impulse of 6 Ns

How do you calculate the speed after an impulse of 6 Ns?

To calculate speed after an impulse of 6 Ns, you would need to use the equation: speed = impulse/mass. The impulse is given as 6 Ns, so you would divide that by the mass of the object to find the speed.

What is an impulse of 6 Ns?

An impulse of 6 Ns is a measure of the change in momentum of an object. It is equivalent to the force applied to an object multiplied by the time the force was applied.

How does the mass of an object affect the speed after an impulse of 6 Ns?

The mass of an object has a direct effect on the speed after an impulse of 6 Ns. The larger the mass, the slower the speed will be, as seen in the equation: speed = impulse/mass.

Can you calculate the speed after an impulse of 6 Ns without knowing the mass of the object?

No, the mass of the object is a necessary component in the equation to calculate the speed after an impulse of 6 Ns. Without knowing the mass, the speed cannot be accurately calculated.

What is the unit of measurement for speed after an impulse of 6 Ns?

The unit of measurement for speed after an impulse of 6 Ns will depend on the units used for impulse and mass. However, it is typically measured in meters per second (m/s).

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