A uniform disk, a uniform hoop, and a uniform solid sphere are released at the s

Question

A uniform disk, a uniform hoop, and a uniform solid sphere are released at the same time at the top of an inclined ramp. They all roll without slipping. In what order do they reach the bottom of the ramp? A) disk, hoop, sphere B) sphere, hoop, disk C) hoop, sphere, disk D) sphere, disk, hoop E) hoop, disk, sphere If the mass of the earth and all objects on it were suddenly doubled, but the size remained the same, the acceleration due to gravity at the surface would become A) 2 times what it now is. B) 1/2 of what it now is. C) 4 times what it now is. D) 1/4 of what it now is. E) the same as it now is.

Explanation / Answer

7.
time taken to rach bottom is directly propional to moment of inertia(I)

I for disk =MR^2/2
I for hoop= MR^2
I for spere=2MR^2/5

So, hoop will reach ground at last and sphere will come first
Answer: D

8.
aceleration due to gravity= GM/R^2
when mass is double aceleration get double

option A Is correct.

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.