Physics momentum and impulse questions

[Ereny]

an 8.0 N force acts on a 5.0 kg object for 3.0 sec. what impulse is given to the object? what change in momentum does to his impulse cause? if the object's initial velocity is 25 m/s determine the final velocity of the object?

i have the right answers because my teacher gave them to use .. but i don't know how to get there.. am i suppose to combine both masses? and use the impulse equation which is p=f.t ??

i am really confused and i would really appreciate any help thanks.

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[cepheid]

an 8.0 N force acts on a 5.0 kg object for 3.0 sec. what impulse is given to the object? what change in momentum does to his impulse cause? if the object's initial velocity is 25 m/s determine the final velocity of the object?

This is all really straightforward. It is asking you for the impulse. Well, what is the definition of impulse?

 

[Ereny]

isn't it a force.. i am really confused btw the meaning of impulse and momentum

 

[NascentOxygen]

an 8.0 N force acts on a 5.0 kg object for 3.0 sec. what impulse is given to the object? what change in momentum does to his impulse cause? if the object's initial velocity is 25 m/s determine the final velocity of the object?

i have the right answers because my teacher gave them to use .. but i don't know how to get there.. am i suppose to combine both masses?

There is only one mass mentioned here, there is no other mass to "combine" it with.

and use the impulse equation which is p=f.t ??

If an impulse acts on a body it causes a change of momentum of that body. Equate the impulse to the change of momentum as: F·∆t = m·∆v

Q: what are the units of momentum?

 

[asteriatic]

First of all, it is important to understand the definitions of momentum and impulse in physics. Momentum is the product of an object's mass and velocity, and it is a measure of the object's motion. Impulse, on the other hand, is the force applied to an object over a period of time, and it is equal to the change in momentum of the object.

In this scenario, an 8.0 N force acts on a 5.0 kg object for 3.0 seconds. To find the impulse given to the object, we can use the equation I = FΔt, where I is the impulse, F is the force, and Δt is the time. Plugging in the values given, we get I = (8.0 N)(3.0 sec) = 24 Ns.

This impulse causes a change in momentum of the object. To find the change in momentum, we can use the equation Δp = mΔv, where Δp is the change in momentum, m is the mass of the object, and Δv is the change in velocity. Since the object's initial velocity is 25 m/s, and we know that the impulse is equal to the change in momentum, we can rearrange the equation to solve for the final velocity. This gives us Δv = I/m = (24 Ns)/(5.0 kg) = 4.8 m/s. Therefore, the final velocity of the object is 25 m/s + 4.8 m/s = 29.8 m/s.

In summary, to solve this problem, we used the impulse equation I = FΔt to find the impulse given to the object, and then used the fact that impulse is equal to the change in momentum to find the change in momentum. Finally, we used the equation Δp = mΔv to solve for the final velocity of the object. It is important to understand the concepts of momentum and impulse in order to solve problems like this in physics.