A cart is moving horizontally along a straight line with constant speed 30 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 80 m. At what speed (relative to the cart) must the projectile be fired (Take g = 10 m/s2) - VgyanHub

Question:

A cart is moving horizontally along a straight line with constant speed 30 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 80 m. At what speed (relative to the cart) must the projectile be fired (Take g = 10 m/s2)

Options :

(a) 10 m/s
(b) 10√8 m/s
(c) 40/3 m/s
(d) None of the above

Answer :

(c) 40/3 m/s

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