A cart is moving horizontally along a straight line with constant speed of 30 m/s. A projectile is 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) and at what angle (to the horizontal) must the projectile be fired?

Question

anonymous · Answer

wel.. its quite simple... unless.. the cart would slow down after the projectile is launched!!.. so does the speed of cart remain the same???

egenriether · Answer

my guess is that the cart remains at its constant speed.  Otherwise we'd be given a mass of the projectile.  just my 2 cents