A boxer moves his head backward while he receive a punch to the head. This is done to

The correct answer is option 1) i.e. increase the contact time and avoid getting hurt

Concept:

Linear momentum:

Linear momentum is the impact caused due to a body in translational motion.

The greater the mass and velocity of the moving body the more will be the impact and thus greater the momentum.

The linear momentum of a moving object is defined as:

p = mv

​Where,

p is the linear momentum, m is the mass of the object, and v is the velocity of the object.

According to Newton's second law of motion, the rate of change of momentum is directly proportional to the force applied by the moving body. 

\(\Rightarrow \frac{dp}{dt}\propto F\)

\(\frac{dp}{dt} = \frac{d(mv)}{dt} = m\frac{dv}{dt} = ma =F\)

Explanation:

• The boxer experiences momentum due to the punch on the head.
• On moving the head backward, he increases the time of contact.

Since \( \frac{dp}{dt}\propto F\), increasing the time of contact for the same momentum decreases the force acting on his head.

• This will help in reducing the force acting on his head and helps avoid injury or getting hurt.