In both cases you come to a complete stop, so why does the leaf pile feel so much better? It takes more time to come to rest falling in a leaf pile, so the stopping force is less.
Why can't you open a door by pushing on its hinged side? A force exerted at the hinges produces no torque about them. It's much easier to carry a weight in your hand when your arm is at your side than it is when your arm is pointing straight out in front of you.
How does a bottle opener use mechanical advantage to pry the top off a soda bottle? Solution: A modest force exerted far from the pivot produces an enormous force close to the pivot.
How does a crowbar make it easier to lift the edge of a heavy box a few centimeters off the ground? - The crowbar has a large lever arm compared to the lever arm of the crowbar on the box on the lid, so the force exerted on the handle is magnified.
How does the string of a yo-yo get the yo-yo spinning? The string pulls on the outside edge of the yo-yo's spindle and at right angles to the lever arm between the yo-you's rotational axis and the point at which the force acts.
Why is it so exhausting to run on soft sand? The sand converts most of the energy of its collision with your feet into thermal energy instead of returning it to you. The sand distorts instead of storing the collision energy.
0:511:12MECHANICAL ADVANTAGE OF INCLINED PLANE - YouTubeYouTubeStart of suggested clipEnd of suggested clipThe longer the length of the inclined. The greater its mechanical advantage. If the length of theMoreThe longer the length of the inclined. The greater its mechanical advantage. If the length of the incline is longer the less effort of force needed to move the object.
The AMA of a machine is calculated as the ratio of the measured force output to the measured force input, where the input and output forces are determined experimentally.Feb 26, 2018
Why can't you open a door by pushing on its hinged side? A force exerted at the hinges produces no torque about them. It's much easier to carry a weight in your hand when your arm is at your side than it is when your arm is pointing straight out in front of you.
The crowbar is a classic example of how the lever is employed to do work easier. With the crowbar, carpenters can easily extract nails from wood that would be nearly impossible and extremely inefficient without such a handy machine.
According to Newton's first law, an object in motion will stay in motion will stay in motion unless acted on by an outside force. When you tap your toothbrush on the sink, the sink stops the toothbrush, but not the water drops, causing them to keep going off the toothbrush making it dry.
The lever arm is defined as the perpendicular distance from the axis of rotation to the line of action of the force.