Hello, this may be a rather simple question but it's beginning to irritate me: If I were launching a marble of, say, 10g (0.010 kg) from a marble launcher with a force of 5N (tell me if this is realistic or not) at an angle of 15 degrees then how would I go about finding the initial velocity of the marble?(adsbygoogle = window.adsbygoogle || []).push({});

Please tell me if I was taking to this question in the correct manner:

I first split the force F into it's horizontal and vertical components:

Fx=5*cos15

Fx=4.83

Fy=5*sin15

Fy=1.29

I then found, using F= m * a, the initial horizontal and vertical acceleration:

Ax = 483

Ay = 129

This is the point I was truly having trouble with, finding the initial vertical and horizontal velocities:

To do this, I assumed that since the initial velocity are found at the moment all of the force is transfered to the marble:

Vx = Ax

Vy = Ay

Is this true?

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# Homework Help: Projectiles question: acquiring initial velocity from force+mass

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