JEE Main Physics question
A cart is moving horizontally along a straight line with constant speed m/s. A projectile is to be fired from the moving cart in such a way that it will return to the cart after the cart has moved m. At what speed (relative to the cart) must the projectile be fired? () **[BCECE 2006]**
Answer: (D)
Solution
As seen from the cart, the projectile must go straight up and come straight back down in the time the cart takes to cover m:
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