Question

Write two applications of static inertia in daily life situations?

Answer 1

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.

Hovercraft are vehicles that can be a challenge to manipulate because, unlike cars, they do not have the same level of friction, so inertia causes the Hovercraft to want to continue in its same direction without stopping or turning.

Abruptly stopping a cart with an object on top causes the object on top to fall off. Inertia causes this by making the object want to continue moving in the direction that it was.

If a stopped car is hit by a moving car from behind, the passengers inside may experience whiplash as a result of the body moving forward but the head lagging behind. The head is experiencing inertia.

If a car is moving forward it will continue to move forward unless friction or the brakes interfere with its movement.

When a baseball is thrown it will continue to move forward until acted upon by gravity. The greater the force of the throw, the harder it is for gravity to act upon it.

A hockey puck will continue to slide across ice until acted upon by an outside force.

A balloon in a car will appear to move when the car moves forward, but the balloon is actually attempting to stay in the place it was, it is only the car that is moving.

When a car is abruptly accelerated, drivers and passengers may feel as though their bodies are moving backward. In reality, inertia is making the body want to stay in place as the car moves forward.

If an index card is placed on top of a glass with a penny on top of it, the index card can be quickly removed while the penny falls straight into the glass, as the penny is demonstrating inertia.

Answer 2

When pulling off a bandage one should pull it fast because our skin will remain at rest due to inertia and the force will pull the bandage off.

Secondly, when jumping from a car our body moves in the direction of the vehicle. When our feet hit the ground, it will act on the feet and stop moving. We will fall because the upper part of our body would not stop and we will fall in the direction in which we were were moving.