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A body of mass m is thrown at an angle to the horizontal with the initial velocity v_0. Assuming the air drag to be negligible, find: (a) the momentum increment Deltap that the body acquires over the first t seconds of motion, (b) the modulus of the momentum increment Deltap during the total time of motion. |
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Answer» SOLUTION :We have `Deltavecp=int vecFdt` `=underset(0)overset(t)intmvecgdt=mvecg t` (1) (B) Using the solution of problem 28(b), the total time of MOTION, `pi=-(2(vecv_0*vecg))/(g^2)` HENCE using `t=tau` in (1) `|Deltavecp|=mg tau` `=-2m(vecv_0*vecg)//g`(`vecv_0*vecg` is `-ve`) |
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