In need of urgent help (physics)?

Question

i know the formula mu+mu=mv+mv but when i substitute the numbers in i cant find the correct answer for this question

A car with a mass of 2000kg moves with the velocity of 36km/h and hit an empty oil tank with mass of 12000kg which is stationary. The collision time is 0.5s and after collision, the car stops and the oil tank moves for 5s before stopping.

(a) determine the velocity of the empty tank just after collision.

(b) what is the change of momentum of the car?

(c)calculate the value of force needed to stop the empty tank.

Answer:(a)1.67 (b)20000 (c)4000

Can someone please show me the full solution.

Answer 1

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