Question

Two objects of masses 100g and 200g are moving along the same line and direction with velocity of 2m/s. They collide and after the collision the first object moves at a velocity of 1.67m/s determine the velocity of second object. Solve according to 9th class

Answer 1

Answer: 2.165m/s

Explanation:

Answer 2

Answer:

1.165

Explanation:

Mass of first objects, m₁= 100 g = 0.1 kg

Mass of second object, m₂ = 200 g = 0.2 kg

Velocity of m₁ before collision, v₁= 2 m/s

Velocity of m₂ before collision, v₂ = 1 m/s

Velocity of m₁ after collision, v₃ = 1.67 m/s

Velocity of m₂ after collision = v₄

According to the law of conservation of momentum:

Total momentum before collision = Total momentum after collision

m₁v₁ + m₂v₂ = m₁v₃+ m₂v₄

⇒ 0.1 * 2 + 0.2 * 1 = 0.1 * 1.67 + 0.2 * v₄

⇒ 0.4 = 0.67 + 0.2 * v₄

⇒ v₄ = 1.165 m/s