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How does time affect the distance traveled by an object in motion?
The Longer it's moving the Further it Goes. Simply, More Time = Further Less Time = Less Distance
Why do pulleys mean that less force is required to lift the object?
Of course less force as effort to lift heavy force as load. Hence mechanical advantage. But as far as energy is concerned it could neither be created nor destroyed. So with less effort we have to move to a longer distance with the load moved only for a small distance. So small force x longer distance = large force x small distance = constant
Why are ramps useful?
They are very useful. Ramps were made to make things easier by spreading the effort over a longer distnace. Say that you were trying to get over a brick wall which was about you height and you were in a wheel chair. Instead of using tones of effort to get over the wall, you could build a ramp and use small effort over a longer distance. The longer the ramp, the less effort but more time. The shorter the ramp, more effort but less time. They are classified as simple machines and as inclined plains.
How do machines such as levers reduce the force needed to lift heavy objects?
By exchanging for for distance. You need to apply less force, but you need to apply it over a larger distance. Since work (or energy transfer) is force x distance, the total work is the same.
Will a longer pendulum swing faster than a shorter one?
no the bob on the shorter one has less distance per period to travel
Why do machines the less force to do the same amount of work?
Because machines allow force to be applied over a greater distance.
How does time affect the distance traveled by an object in motion?
The Longer it's moving the Further it Goes. Simply, More Time = Further Less Time = Less Distance
How do you change the distance of the work?
By applying less force. The more force you apply the less distance there is, but the less force you apply the more distance there is. This is why on a ramp it takes less force to push something up a ramp than to lift it, but at the same time it takes a longer distance to move the object in question. On the other hand, simply lifting the object will require more force but less distance.
Why do pulleys mean that less force is required to lift the object?
Of course less force as effort to lift heavy force as load. Hence mechanical advantage. But as far as energy is concerned it could neither be created nor destroyed. So with less effort we have to move to a longer distance with the load moved only for a small distance. So small force x longer distance = large force x small distance = constant
When you use a ramp what happens to the distance over which you exert force?
The distance is longer than the lift or the drop, but the force you need is less than the weight of the load.
Why are ramps useful?
They are very useful. Ramps were made to make things easier by spreading the effort over a longer distnace. Say that you were trying to get over a brick wall which was about you height and you were in a wheel chair. Instead of using tones of effort to get over the wall, you could build a ramp and use small effort over a longer distance. The longer the ramp, the less effort but more time. The shorter the ramp, more effort but less time. They are classified as simple machines and as inclined plains.
Is the distance between Toledo and Columbus greater or less than the distance between Toledo and Akron?
It is a 7 mile longer drive at 145 miles then is the drive to Akron.
How do machines such as levers reduce the force needed to lift heavy objects?
By exchanging for for distance. You need to apply less force, but you need to apply it over a larger distance. Since work (or energy transfer) is force x distance, the total work is the same.
What is the trade off of effort in using simple machines?
The simple machines - a lever for example - are usually designed so that you need less force. In compensation, you need to move the lever for a greater distance. This follows directly from the law of conservation of energy.
Why are mars years longer than the days?
Because it spins on its own axis at more or less the same speed Earth does, giving it a day/night time of approximately the same as Earth's, longer by more or less a couple of hours. Mar's year is longer because it has a longer distance to travel around the sun and less angular momentum than Earth's so it takes longer, almost double Earth's the time.
Why do fiber-optic cable span much longer distance before requiring repeaters?
They lose less energy over distances
Will a shorter pendulum swing faster than a longer one?
no the bob on the shorter one has less distance per period to travel
