1.

Find the speed of two objects such that when they move uniformly towards each other , they get 4.0 meters closer each second and when they move uniformly in the same direction with original speeds , they get 4.0 metres closer each 10 sec.

Answer»

SOLUTION :Let their SPEEDS be `v_(1)"and " v_(2) ` and let `v_(1)gtv_(2)`.
In First Case :Realative VELOCITY , `v_(1)-v_(2)=4 `….(1)
In Sencond Case: Relative velocity ,`v_(1)-v_(2)=4/(10)=0.4`….(2)
Solving eqns. (1)and (2), we GET `v_(1)=2.2ms^(-1), v_(2) = 1.8 ms^(-1)`.


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