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A truck is moving with 40 m/s velocity, a train is moving with a velocity of 80 m/s. How fast is the rain moving with respect to the truck?(a) 40 m/s faster(b) -40 m/s faster(c) 40 m/s slower(d) 60 m/s slowerI got this question in examination.My doubt stems from Motion in a Straight Line in portion Motion in a Straight Line of Physics – Class 11

Answer»

Right OPTION is (a) 40 m/s FASTER

Easy explanation: Here we need to find the relative velocity of the TRAIN with respect to the truck is VR = VA-VB, VB = 40, VA = 80. On SOLVING we get, VR = 40 m/s. Hence the train will MOVE faster by 40 m/s.



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