- Aif its speed is constant it has no acceleration
- Bthe direction of its acceleration cannot be along the tangent.
- Cif its speed is constant the magnitude of its acceleration is proportional to its curvature.
- ✓Both $(B)$ and $(C)$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Reason $R$ : The efficiency of Carnot's engine depends not only on temperature of cold reservoir but it depends on the temperature of hot reservoir too and is given as $\eta=\left(1-\frac{ T _2}{ T _1}\right)$.
In the light of the above statements, choose the correct answer from the options given below
(Take radius of earth $=6400\,km$ and $g =10\,ms^{-2}$ )
$F=F_{0}\left(1-\left(\frac{t-T}{T}\right)^{2}\right)$
Where $F_{0}$ and $T$ are constants. The force acts only for the time internal $2 T$. The velocity $v$ of the particle after time $2 {T}$ is -
[Use: Specific heat capacity of water $=4200$
$J\,kg ^{-1} K ^{-1}$, Latent heat of ice $\left.=3.5 \times 10^{5} J\,kg ^{-1}\right]$