Seat belts are among the most common and effective safety devices ever invented. Since their introduction, seat belts have saved countless lives and prevented many injuries. But making it mandatory to wear seat belts has been a slow process, as they were required by law in each state at a different time.
The person walking down the sidewalk follows the newton's third law of motion.
Explanation:
- A person is able to walk down the sidewalk by using the reaction forces from the ground.
- In simple term, feet pushes the ground and the reaction forces makes the feet able to walk.
- Another important force included in the walking mechanism is friction. With out friction one cannot walk down the sidewalks.
- Hence the forces involved in the walking of a person down the sidewalk are:
- Friction force
- Action and reaction force between ground and person's feet.
The acceleration of a 0.90 g drop of blood in the fingertips at the bottom of the swing is the sum of the acceleration of the movement of the finger and the acceleration of gravity. In this case, this is different when the finger goes down, since the acceleration now becomes the difference between the two.
A mechanical wave
glad to help out!
You would use h=1/2*g*t^2
Therefore,
g= 9.81
h= 1/2*9.81*6^2
h= 176.58m
