Two particles A and B of mass 2kg and 3kg respectively are moving head on. A is moving at 5m/s and B is moving at 4m/s. After the collision, A rebounds at 4m/s. What is the speed of B and what direction is it moving in?
Using conservation of momentum, m1u1 + m2u2 = m1v1 + m2v2, set m1 = 2kg, m2 = 3kg, u1 = 5m/s, u2 = -4m/s and v1 = -4m/s. Substitute these into the equation to get 25 + 3(-4) = 2*(-4) + 3*v2 10 - 12 = -8 +3v2 6 = 3v2 v2 = 2m/s and is moving in the positive direction, away from A.
AS
Related Maths A Level answers
All answers ▸Using integration by parts, and given f(x) = 3xcos(x), find integrate(f(x) dx) between (pi/2) and 0.
Find the area under the curve y = (4x^3) + (9x^2) - 2x + 7 between x=0 and x=2
How do you integrate xcos(x)?
Find the solutions of the equation: sin(x - 15degrees) = 0.5 between 0<= x <= 180