Grade 12Mechanics

two trains A &B are 100 Km apart traveling towards each other with starting speed for each 50 Km/hr trainA accelerate 20 & B retards 20 distance covered by A when they cross each other

divya

10 Years agoGrade 12

1 Answer

Abhay

8 Years ago

As s=ut+1/2at^2 here a is relative acc. i.e =0)So 100=100t+0 (here u relative equal to 50+50 as trains traveling in opposite direction)t=1So distance in 1 sec. by a equal ut+1/2at^2=50+1/2×20×1 (here a and u for a)=60km

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two trains A &B are 100 Km apart traveling towards each other with starting speed for each 50 Km/hr trainA accelerate 20 & B retards 20 distance covered by A when they cross each other

divya

1 Answer

Abhay

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A car loaded with water having total mass 1000 kg moves on a straight horizontal Road starting from rest under the action of a force of 100 Newton. The water spills throw a small hole in the bottom at a rate of 0.1 KG per second the velocity of cart after 300 seconds is nearly.11213141

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