Question

Question 1 A) A group of students were setting up their school auditorium for a rock concert to be held over the weekend. The students used a ramp to get one of the large speakers onto the stage. The students know that Work = Force x Distance. Which of the following BEST explains the advantage of using the ramp instead of lifting the speaker onto the stage? (1 point) Responses The mass of the speaker is reduced by using the ramp. The mass of the speaker is reduced by using the ramp. More energy is created by using the ramp More energy is created by using the ramp Less force is required by using the ramp. Less force is required by using the ramp. The amount of work done is decreased by using the ramp. The amount of work done is decreased by using the ramp. Question 2 A)Aidan lifts a box from the floor, carries it across the room, and places it on a high shelf. When is Aidan doing work on the box?(1 point) Responses He does work on the box at no time during this process. He does work on the box at no time during this process. He does work only while he carries the box across the room. He does work only while he carries the box across the room. He does work from the moment he touches the box until he lets it go. He does work from the moment he touches the box until he lets it go. He does work as he picks up the box and as he lifts it to the shelf. He does work as he picks up the box and as he lifts it to the shelf. Question 3 A)Which of the following statement is NOT true about machines?(1 point) Responses Machines change the direction of a force needed to do the work. Machines change the direction of a force needed to do the work. Machines decrease the amount of work that is done. Machines decrease the amount of work that is done. Machines change the size of a force needed to do the work. Machines change the size of a force needed to do the work. Machines change the way work is done. Machines change the way work is done. Question 4 A) Four people mow a lawn in the table below. Who does the most work? (Work = Force * displacement) Person Force (N) Displacement (m) Time (s) 1 2 10 10 2 10 2 20 3 2 5 10 4 5 2 20(1 point) Responses Person 1 Person 1 Person 2 Person 2 Person 3 Person 3 Person 4 Person 4 Person 1 and 2 do the same amount of work Person 1 and 2 do the same amount of work Person 3 and 4 do the same amount of work

Answer 1

Here are the answers to your questions:

**Question 1 A)** The BEST explanation for the advantage of using the ramp instead of lifting the speaker onto the stage is:
**Less force is required by using the ramp.**

**Question 2 A)** Aidan is doing work on the box:
**He does work as he picks up the box and as he lifts it to the shelf.**

**Question 3 A)** The statement that is NOT true about machines is:
**Machines decrease the amount of work that is done.** (This statement is misleading; machines do not decrease the total work done; they help to apply the force in a more effective way, but the total work remains the same.)

**Question 4 A)** To find out who does the most work, we calculate the work for each person (Work = Force * Displacement):
1. Person 1: Work = 2 N * 10 m = 20 J
2. Person 2: Work = 10 N * 2 m = 20 J
3. Person 3: Work = 2 N * 5 m = 10 J
4. Person 4: Work = 5 N * 2 m = 10 J

Persons 1 and 2 perform the same amount of work.
**The answer is: Person 1 and 2 do the same amount of work.**

If you have any further questions, feel free to ask!