MCQ
A body, thrown upwards with some velocity reaches the maximum height of $50 m$. Another body with double the mass thrown up with double the initial velocity will reach a maximum height of $..........\,m$
- A$100$
- ✓$200$
- C$300$
- D$400$
$H _{\max } \propto u ^2$, if body is projected with double velocity then maximum height will become four times i.e. $200\,m$.
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$\vec r = - \cos \,t\hat i + \sin \,t\hat j - 18\,t\hat k$
then what is the magnitude of its acceleration ?
