Question

Two objects of same material are travelling near you. Object A is a 1.4 kg mass traveling 14.2 m/s; object B is a 2 kg mass traveling 5 m/s. Which object would make you feel worse if you are hit by it?

Answer 1

Object A

Step-by-step explanation:

given,

Object A

mass,m₁ = 1.4 Kg

speed of the car,v₁ = 14.2 m/s

object B

mass,m₂ = 2 Kg

speed,v₂ = 5 m/s

Kinetic energy of the object will be absorbed by you when it hit you.

`KE_1 = (1)/(2)mv_1^2`

`KE_1 = (1)/(2)* 1.4 * 14.2^2`

KE₁ = 141.148 J

kinetic energy of the object B

`KE_2 = (1)/(2)m_2v_2^2`

`KE_2 = (1)/(2)* 2 * 5^2`

KE₂ = 25 J

Hence, the Object A will feel worse if hit you because of the kinetic energy of the object A is more.