A disk and a sphere of same radius but different masses roll on two inclined planes of the same altitude and length. Which one of the two objects gets to the bottom of the plane first ?
A). Depends on their masses
B). Sphere
C). Disk
D). Both reach at the same time
Sphere
The sphere will reach the bottom faster than the disk. It is because the disk has a higher rotational inertia than the solid:
I= mr²
I is the rotational inertia where m is the mass and r is the square of distance from the axis of rotation. in the case of disk I is greater due to r and more the I, more is the rotational K.E. Then for conservation of energy Translational K.E will be less.
mgh= K.E (T) + K.E (R)
so in case of sphere translational K.E will be more, meaning more final velocity and it will reach the bottom faster.
1. A falling drop of rain water acquires the spherical shape due to
2. During the Independence Movement, Subhash Chandra Bose revamped the Indian National __________.
3. Heat transfer horizontally within the atmosphere Is called
4. What is the unit of the physical quantity "Inductance"?
5. Sound waves are similar to the?waves
6. Which one of the following is not a?result of surface tension?
7. Which waves cannot be transmitted through vacuum?
8. If an object is thrown upwards, what will be its velocity, when it reaches its maximum height?