Admin Table of Contents
- 1 What happens when a machine increases distance?
- 2 When the output force is greater the force is?
- 3 Which of these simple machines is the output force exerted by the machine greater than the input force exerted by the user?
- 4 What happens to the mechanical advantage of a machine if the output force is equal to the input force?
- 5 What is the output force of a machine?
- 6 Why must the input distance be greater than the output distance?
What happens when a machine increases distance?
Machines make work easier by increasing the amount of force that is applied, increasing the distance over which the force is applied, or changing the direction in which the force is applied. For the same reason, if a machine increases the distance over which the force is applied, it must apply less force.
When the output force is greater the force is?
Mechanical Advantage = Output Force / Input force. In a machine that has a mechanical advantage of more than 1 which force is greater. Output force is greater than the input force.
Which increases the output force of a machine?
Chapter 14: Work, Power, and Machines
| A | B |
|---|---|
| mechanical advantage | the number of times that a machine increases an input force |
| actual mechanical advantage | the ratio of the output firce to the input force in a machine |
| ideal mechanical advantage | the mechanical advantage in the absence of friction |
What effect do simple machines have on input and output forces?
A simple machine uses a single applied force to do work against a single load force. Ignoring friction losses, the work done on the load is equal to the work done by the applied force. The machine can increase the amount of the output force, at the cost of a proportional decrease in the distance moved by the load.
Which of these simple machines is the output force exerted by the machine greater than the input force exerted by the user?
wheelbarrow
(a) In the case of the wheelbarrow, the output force or load is between the pivot and the input force. The pivot is the wheel’s axle. Here, the output force is greater than the input force. Thus, a wheelbarrow enables you to lift much heavier loads than you could with your body alone.
What happens to the mechanical advantage of a machine if the output force is equal to the input force?
A machine will have a mechanical advantage of 1 if the input force and the output force are equal. This occurs when the machine changes the direction of force but not the distance over which the force is applied. Compare mechanical advantage to ideal mechanical advantage.
When a machine increases the input force what happens to the input distance?
Increasing Distance: When a machine increases distance, the output force is less than the input force. Your input may be cut in half, but your input distance is doubled. Changing Direction: If only the direction changes, input force will be the same as the output force. The mechanical advantage will always be 1.
When a machine decreases the force acting on an object What happens to the distance the object?
As the force decreases, the distance increases. So, if the mechanical advantage is 2, you pull 2 meters of rope to lift the object 1 meter.
What is the output force of a machine?
Output Force the force exerted by a machine (what the machine does) A machine produces a larger force than you exert to operate the machine. How does the input distance of the machine compare to its output distance? Because the output force is greater than the input force, the input distance must be greater than the output distance.
Why must the input distance be greater than the output distance?
Because the output force is greater than the input force, the input distance must be greater than the output distance. Mechanical Advantage the number of times a machine increases a force exerted on it
What is the difference between input and output direction?
Direction in which force is exerted Input Force the force exerted on a machine (what you apply) Output Force the force exerted by a machine (what the machine does) A machine produces a larger force than you exert to operate the machine. How does the input distance of the machine compare to its output distance?
Why is work done by a machine always less than work done?
Because of friction, the work done by a machine is always less than the work done on the machine. What changes can a machine make to a force? Size of force; direction of force; distance through which a force acts. A machine produces a larger force than you exert to operate the machine.