Answer:
Magnetic force,

Step-by-step explanation:
It is given that,
Velocity of proton,

Angle between velocity and the magnetic field, θ = 53°
Magnetic field, B = 0.49 T
The mass of proton,

The charge on proton,

The magnitude of magnetic force is given by :



So, the magnitude of the magnetic force on the proton is
. Hence, this is the required solution.