Name: Introduction to Force and Inertia
Uploaded: 2019-07-19
Duration: 6 min 32 s
Description: Force is the influence that can change the state of an object. In this video, we will study force and its types. Let's watch the video and learn.

Question

&ldquo;Wearing helmet and fastening the seat belt is highly recommended for safe journey&rdquo;. Justify your answer using Newton&rsquo;s laws of motion.

Accepted Answer

According to Newton’s second law, when you fall from a bike and hit the ground. According to Newton’s third law, an equal and opposite force by the ground is exerted on your body. When you do not wear a helmet, this force can cause fatal head injuries. So it is important to wear a helmet for a safe journey because it absorbs the jerk and reduce the impact.

Inertia is the reason that people in cars need to wear seat belts. A moving car has inertia, and so do the riders inside it. When the driver applies the brakes, it applies an unbalanced force to the car. Normally the bottom of the seat applies imbalanced force friction, which slows the riders down as the car slows. If the driver stops the car suddenly, however, it does not exert force over enough time to stop the motion of the riders. Instead, the riders continue moving forward with most of their original speed because of their inertia.

“Wearing helmet and fastening the seat belt is highly recommended for safe journey”. Justify your answer using Newton’s laws of motion.

Important Questions on Laws of Motion

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