Question

A sphere is rolling on a frictionless surface as shown in Fig. with a translational velocity vms^-1. If it is to climb the inclined surface then v should be

• A. ≥
• B. ≥ $\sqrt { 2 g h }$
• C. 2gh
• D. $\frac { 10 } { 7 } \mathrm { gh }$

Answer 1

Answer: (A)

≥

Answer 2

$\frac { 1 } { 2 } \mathrm { I } ^ { 2 } + \frac { 1 } { 2 } \mathrm { mv } ^ { 2 } \geq \mathrm { mgh }$

or

or v ≥