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Q. A uniform magnetic field of 0.50 T is directed along the positive x axis. A proton moving with a speed of 60 km/s enters this field. The helical path followed by the proton shown has a pitch of 5.0 mm. Determine the angle between the magnetic field and the velocity of the proton.

Q. The mass of a roller-coaster car, including its passengers, is 512 kg. Its speed at the bottom of the track in the figure below is 18 m/s. The radius of this section of the track is r1 = 26 m. Find the force that a seat in the roller-coaster car exerts on a 53-kg passenger at the lowest point.

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Category:- Physics
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