Which of the following is the standard unit of measurement of mass?
a) Gram
b) Kilogram
c) Pound
d) Dozen

Answer

A, B, D

Explanation

Since the motion is non uniform, the acceleration has both radial and tangential components.
`a=v^2/r`
`a_t=(dv)/(dt)=a`
Resultnt magnitude = `sqrt((v^2/r)^2+a^2)`
`Now, mN=msqrt((v^2/r)^2+a^2`
`rarr mumg=msqrt((v^2/r)^2+a^2`
`rarr mu^2g^2=v^4/r^2+a^2`

`rarr v^4/r^2=(mu^2g^2-a^2)`
`rarr v^4=(mu^2g^2-a^2)r^2`
`rarr v=[(m^2g^2-a^2)r^2]^)1/4)`