Question

Erin collides her 940-kg Mazda Miata into the rear of a 2460-kg pick-up truck which was at rest at the light on Lake Avenue. The Mazda pre-collision speed was 12.5 m/s. Determine the post-collision speed of the two entangled cars as they slide across the ice.

Answer 1

Answer:

3.46 m/s

Explanation:

This is actually a Physics question and not a Business question.

According to the property of conservation of momentum, the speed of the Mazda before the collision multiplied by the mass of the Mazda must equal the speed after the collision multiplied by the mass of both cars:

$m_1v_1=(m_1+m_2)*v_2\\940*12.5=(940+2460)*v_2\\v_2= 3.46\ m/s$

The post-collision speed of the two entangled cars is 3.46 m/s.