A particle of mass m with speed u makes an elastic 1D collision with identical stationary mass. Contact force rises linearly 0→F₀ in T/4, stays F₀ for T/2, then falls linearly to zero in T/4. F₀ is:

Question

A particle of mass m with speed u makes an elastic 1D collision with identical stationary mass. Contact force rises linearly 0→F₀ in T/4, stays F₀ for T/2, then falls linearly to zero in T/4. F₀ is:

G1 Physics · Accepted Answer

Impulse I = Δp = ∫F dt. For a force–time graph, use the signed area under the graph. The calculation gives C: 4mu/(3T).