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Chrome File Edit View History Bookmarks People Window Help B 47% D Wed 8:29 PM a E Mastering Physics: assingment 4 https:// session. masteringphysics.com next phy 106 Signed in as Eric Staudter I Help I Close assingment 4 Problem 20.20 Resources previous l 6 of 10 l next Problem 20.20 Part A A 3.25 g bullet picks up an electric charge of 1.15 Calculate the magnitude of the magnetic force on the bullet Au C as it travels down the barrel of a rifle. It leaves Express your answer with the appropriate units the barrel at a speed of 413 m/s traveling perpendicular to the earth's magnetic field, which has a magnitude of 5.50x10 4 T Value Units Submi My Answers Give Up Part B Calculate the magnitude of the bullet's acceleration due to the magnetic force at the instan leaves the rifle barrel Express your answer with the appropriate units a Value Units Submit My Answers Give Up

Explanation / Answer

Given that the velocity of the bullet is perpendicualr to the direction of the magentic field, then the force on the bullet is

F =qvB =(1.15*10-6C)(413m/s)(5.50*10-4T) =2612.225*10-10N =2.612*10-7N

Now the acceleration of the bullet is given by

F=ma ====> a =F/m =2.612*10-7N/3.25*10-3kg =0.8036*10-4m/s2 =8.036*10-5m/s2

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