pls solve these 2 Q.
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aakk27:
namaste! kya hal h.
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11. the answer is clearly mv^2/r .. which is centripetal force .... (it is applicable to any body moving in circular path)
12. the initial velocity is (+4)m/s .. then after completing semi circular path .. it's velocity is (-4)m/sec.. bcoz it will be opposite in direction.. so ..the magnitude of change in velocity is = 4 - (-4) = 8 m/s ....
12. the initial velocity is (+4)m/s .. then after completing semi circular path .. it's velocity is (-4)m/sec.. bcoz it will be opposite in direction.. so ..the magnitude of change in velocity is = 4 - (-4) = 8 m/s ....
maine Q. 12 aise interpret kiya ki...' magnitude' means without direction so speed is just magnitude of velocity n speed isn't changing so the change should have been 0. but now got it why mine is wrong.
haan wese.. ye confusing h... matlb.. question me likhe h ki .. magnitude of change in velocity .. matlb.. pehle change in velocity nikaalo fir uska magnitude... taaki .. agar 4-(-4) = 8 ki jagah (-4)-4 = (-8) ye bhi ho skta h ... agar magnitude nhi kehta to 8 or (-8) dono sahi hote but... magnitude bola h to .. positive hi hoga
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