II. Directions: Write T if the statement is true. If it is false, change the underlined word to make the statement correct
1. Less force is needed to lift an object when using an inclined plane.
2. With an inclined plane, less force is exerted over a longer distance.
3. For a given length of an inclined plane, the steeper it is, the greater is the force to be exerted on an object to move it over a certain distance.
4. The effort is greater than the resistance when moving an object up an inclined plane than when lifting it directly upward.
5. The inclined plane is a compound machine whose one end is higher than the other.
1. Less force is needed to lift an object when using an inclined plane.
2. With an inclined plane, less force is exerted over a longer distance.
3. For a given length of an inclined plane, the steeper it is, the greater is the force to be exerted on an object to move it over a certain distance.
4. The effort is greater than the resistance when moving an object up an inclined plane than when lifting it directly upward.
5. The inclined plane is a compound machine whose one end is higher than the other.
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Answer:
1.T
2. greater
3.T
4.T
5.lower efficiency
My explanation about the answer-
1.Moving an object up an inclined plane requires less force than lifting it straight up, at a cost of an increase in the distance moved. The mechanical advantage of an inclined plane, the factor by which the force is reduced, is equal to the ratio of the length of the sloped surface to the height it spans.
2.Due to conservation of energy, the same amount of mechanical energy (work) is required to lift a given object by a given vertical distance, disregarding losses from friction, but the inclined plane allows the same work to be done with a smaller force exerted over a greater distance.
3.Less force is needed to move an object uphill with an inclined plane, but the force must be applied over a greater distance. The mechanical advantage of an inclined plane is always greater than 1, because the machine puts out more force than the user puts into it.