A machine's main purpose is:
A To increase the force you apply by changing its direction or multiplying the distances it is applied.
B To increase the power used by decreasing the amount of time you have to do a certain work.
C To change the effort of the work by increasing the distance a force is applied or changing its direction.
D To decrease the amount of work is done by increasing the distance a force is applied or changing its direction.
C To change the effort of the work by increasing the distance a force is applied or changing its direction.
Is this correct? If so, please provide an explanation m
My apologies for the mistake in the previous response. The correct answer is:
A To increase the force you apply by changing its direction or multiplying the distances it is applied.
Machines are designed to make tasks easier by increasing the force that can be applied to accomplish a specific task. They achieve this by changing the direction of the force or multiplying the distance over which the force is applied. By doing so, machines allow us to exert a greater force than what would be possible without the machine.
A catapult as the one shown in the image is an example of
See Detail A
heavy counterweight
pouch
- sling
payload
frame
beam
Class 2 lever
A pulley system
Class 1 lever
Inclined plane
The correct answer would be:
C Class 2 lever
Erin uses 30N of force to push a lawn mower 10 meters. How much work does she do?
300 J
30 J
3J
3,000J
To calculate the work done by Erin, we can use the formula:
Work = Force x Distance
Given that Erin uses 30N of force to push the lawn mower for 10 meters, we can substitute these values into the formula:
Work = 30N x 10m = 300 Joules
Therefore, Erin does 300 Joules of work. Hence, the correct answer is:
300 J
Match the correct class of lever with the correct picture.
DRAG & DROP THE ANSWER
Second Class Lever
Third Class Lever
First Class Lever
First Picture: Effort and Load are going down on both sides while the Fulcrum is in the middle
Second Picture: The Load is at the top in the middle. The effort is below on the left side and the fulcrum is on the right side
Third Picture: The Load is at the top right while the Effort is at the bottom in the middle and the Fulcrum is at the bottom at the left side
I apologize, but as a text-based AI, I am unable to visualize or provide images for drag and drop activities. However, I can describe the correct matches for you:
First Picture: First Class Lever
- In a first-class lever, the fulcrum is in the middle, with the effort and load on opposite sides. In this picture, if the effort and load are going down on both sides, then it matches the description of a first-class lever.
Second Picture: Third Class Lever
- In a third-class lever, the effort is applied between the fulcrum and the load. In this picture, if the load is at the top in the middle, the effort is below on the left side, and the fulcrum is on the right side, then it matches the description of a third-class lever.
Third Picture: Second Class Lever
- In a second-class lever, the load is between the fulcrum and the effort. In this picture, if the load is at the top right, the effort is at the bottom in the middle, and the fulcrum is at the bottom on the left side, then it matches the description of a second-class lever.
A pulley system is marked with a Mechanical Advantage of 2.5. A worker applies 450N to the pulley in an attempt to lift a sound system with a 1500N weight. Of this task we could say that:
The work done by the worker will be lower than the work done by the pulley system while lifting the sound system.
It is impossible ta lift the sound system using a pulley system, you must use a third-class lever.
It is impossible to lift that much weight with this system so no movement should be observed.
The mechanical advantage must be incorrect, as the mechanical advantage can not have decimals.