Question

What is inertia?Give three examples.And please whoever teacher will give the answer please tell the most simple explanation.

Answer 1

• Inertia

Inertia is a property of matter that causes it to resist changes in velocity (speed and/or direction). According to Newton's first law of motion, an object with a given velocity maintains that velocity unless acted on by an external force. Inertia is the property of matter that makes this law hold true.

• One's body movement to the side when a car makes a sharp turn.
• Tightening of seat belts in a car when it stops quickly.
• A ball rolling down a hill will continue to roll unless friction or another force stops it.
• Men in space find it more difficult to stop moving because of a lack of gravity acting against them.
• If pulled quickly, a tablecloth can be removed from underneath of dishes. The dishes have the tendency to remain still as long as the friction from the movement of the tablecloth is not too great.
• Shaking a bottle of ketchup. When bringing the bottom down, the suddenly stopping it, inertia is what causes the ketchup to come out of the bottle.
• When playing football, a player is tackled and his head hits the ground. The impact stops his skull, but his brain continues to move and hit the inside of his skull. His brain is showing inertia.
• If one drove a car directly into a brick wall, the car would stop because of the force exerted upon it by the wall. However, the driver requires a force to stop his body from moving, such as a seatbelt, otherwise inertia will cause his body to continue moving at the original speed until his body is acted upon by some force.