Asked by Austin

Ms. Sue please help.
8. Which would best reduce the amount of energy needed to pull a wagon up a ramp? (1 point)
increasing the slope of the ramp
reducing the friction between the wagon wheels
reducing the length of the wagon handle
increasing the friction between the wagon wheels
9. To lift a load to the roof, you apply 21 N of force to a pulley. The pulley applies 21 N of force to the load. What is the mechanical advantage of the pulley? (1 point)
0
1
40
21
10. Carla applied a force of 35 N to a wheelbarrow full of bricks and moved it 2.5 m. Which of the following can be determined from this information? (1 point)
The wheelbarrow supplied 87.5 J of work.
The wheelbarrow has a mechanical advantage of 14.
The wheelbarrow is 7 percent efficient.
The wheelbarrow has 87.5 J of potential energy.

my answers
8.b
9.c
10.a
Answered by Damon
8.b yes
9.c Huh? 21/21 = 1
10.a I do not think so. She, not the wheelbarrow, supplied the work.
If it weighed 35 N and she lifted it 2.5 meters, then D would be correct.
The problem is poorly written. It is not clear if the force is in the direction of motion.
Answered by Lionesscave3
CA Unit 2 Lesson 4
Gravitational Potential Energy
1)B
2)A
3)D
4)B
5)C
6)A
7)D
8)B
9)B
10)A
Answered by kc
8.B
9.C
Answered by Anonymous
Are they right?
Answered by Jackson
No they are wrong only 8/10 :(
Answered by Taylor
B
A
D
B
C
A
D
B
B
A
Answered by Anonymous
Do you have the right answers?
Answered by Racen
Taylor and anon are correct
Answered by Anonymous
oh ok I will try them
Answered by Anonymous
Is it for unit 2 or 3?
Answered by MY NAME IS PURPLE
They are correct and it is for unit 3. For 8th grade science.
Answered by nyan cat the poptart cat!
THANK YOU SO MUCH! TAYLOR IS CORRECT YES FINALLY SO SO GREATFUL!!!!!!!!!! :D
Answered by o meh gawd
Taylor is 100% correct. Just be sure to answer with all her answers correctly!!
Answered by Mia
Does this work for 6th grade science as well because the questions are the same
Answered by 8845637
Thank you so much Taylor is a 100% correct
Answered by Gal42
So is Taylor correct with her answers? It’s only 1-10. It’s the same for me but 1-11 for 6th grade science same questions pls help
Answered by Bobthebuilder
Mine says the responses are saved but i have a good feeling abou the answers. Tysm.
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