Answer choices: The mechanical advantage makes the work output greater than the work input. The machine can put out force without having any force applied to it. A large force can be exerted through a long distance to have a small force exerted through a short distance.
Which is a result of using a machine the mechanical advantage?
A machine can decrease either the input force or the input distance needed to do a given amount of work. ... It can put out more force than the input force by decreasing the distance through which force is applied. It can increase the amount of work performed if the output force is in the same direction as the input force.
Which is a result of using a machine the amount of work that is done is increased?
Contrary to popular belief, machines do not increase the amount of work that is done. They just change how the work is done. 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.
What is the resulting force exerted by a machine?
The force you exert on a machine is called input force (or effort). The force exerted by a machine is called output force (or resistance) .
What is the mechanical advantage of a machine that applies a force of 1000 N to an object when a force of 500 N is applied to the machine?
A machine can decrease both the input force and the input distance needed to do a given amount of work. What is the mechanical advantage of a machine that applies a force of 1000 N to an object when a force of 500 N is applied to the machine? A machine has an efficiency of 80% .
What is mechanical advantage Grade 8?
Mechanical Advantage A ratio of what is produced by a machine (output) to what is put into the machine (input).
Which statement best describes why machines useful?
Answer: “ A machine can decrease either the input force or the input distance needed to do a given amount of work” is the best statement that describes why a machine is useful.
How machines make our life easier?
There are three ways simple machines make work easier: by increasing the distance through which force is applied , by changing the direction of applied force, or by multiplying force of speed of the energy applied. ... Turning the wheel a greater distance produces a short and more powerful movement at the axle.
Why is no machine 100 efficient?
Explanation: No machine is free from the effects of gravity, and even with wonderful lubrication, friction always exists. The energy a machine produces is always less than the energy put into it (energy input). ... That is why 100% efficiency in machines shall not be possible .
How do machines help us?
Simple machines are useful because they reduce effort or extend the ability of people to perform tasks beyond their normal capabilities . Simple machines that are widely used include the wheel and axle, pulley, inclined plane, screw, wedge and lever.
What are 3 examples of a wheel and axle?
Some examples of the wheel and axle include a door knob, a screwdriver, an egg beater, a water wheel, the steering wheel of an automobile, and the crank used to raise a bucket of water from a well . When the wheel in a wheel and axle machine is turned, so is the axle, and vice versa.
Which machine is used to multiply the force?
Simple machines are devices that can be used to multiply or augment a force that we apply – often at the expense of a distance through which we have to apply the force. A few simple machines are the lever, nail puller, wheelbarrow, crank, etc.
What is called resultant reaction?
The resultant is the vector sum of two or more vectors . It is the result of adding two or more vectors together. If displacement vectors A, B, and C are added together, the result will be vector R. As shown in the diagram, vector R can be determined by the use of an accurately drawn, scaled, vector addition diagram.
How much a machine changes the input force is its?
Mechanical advantage is how much a machine changes the input force. 2. Mechanical advantage can be calculated as the ratio of the output force to the input force of a machine.
What is the mechanical advantage of the pulley?
Using multiple pulleys decreases the amount of force necessary to move an object by increasing the amount of rope used to raise the object. The mechanical advantage (MA) of a pulley system is equal to the number of ropes supporting the movable load .
What is the mechanical advantage of a machine quizlet?
Mechanical advantage is a measure of the force amplification achieved by using a tool , mechanical device or machine system. the input power and simply trades off forces against movement to obtain a desired amplification in the output force.
