(a(i))[2]
Calculate the mass of water striking the wall in 1.0 s.
(a(ii))[2]
Calculate the horizontal momentum of the water striking the wall in 1.0 s.
(b)[2]
The horizontal momentum of the water drops to zero when it reaches the wall. No water rebounds from the wall. Explain why the momentum calculated in a(ii) is equal in size to the horizontal force exerted on the water by the wall.
(c)[2]
Explain, in terms of Newton’s third law, why the water exerts a horizontal force on the wall.
(d)[1]
The pump driving the water through the hose is adjusted, and the speed of the water leaving the hose doubles. Explain why the force exerted by the water on the wall increases by a factor of 4.