An `alpha` particle is moving with a velocity of `(7 xx 10^(5) hat I m//s)` in a magnetic field of `(5 hat I + 9 hat j)` T. Find the magnetic force acting on the particle.

Explanation

To find the magnetic force acting on an alpha particle moving in a magnetic field, we can use the formula for magnetic force:

\[ \mathbf{F} = q (\mathbf{v} \times \mathbf{B}) \]

where:
- \( \mathbf{F} \) is the magnetic force,
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