A gun fires 20 balls per second, each of mass 20 g, elastically at the centre of a horizontal table at speed 5 m s⁻¹ and 60° with the vertical just before impact. Table weight is 0.2 kg, g=10 m s⁻². Force exerted by one leg on ground is:
Physics · Center of maas , Momentum and Collision · variable mass system
A gun fires 20 balls per second, each of mass 20 g, elastically at the centre of a horizontal table at speed 5 m s⁻¹ and 60° with the vertical just before impact. Table weight is 0.2 kg, g=10 m s⁻². Force exerted by one leg on ground is:
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