1.

Two projectiles, one fired from earth with 5 ms -1 and other fired from a planet with 3 ms -1 at the same angle trace identical trajectories. Neglecting friction, what is the acceleration due to gravity on planet ? (g = 9.8 ms^(-1) ):

Answer»

3.5 `MS^(-2)`
`8.5ms^(-2)`
`1.5ms^(-2)`
`5.3ms^(-2)`

SOLUTION :`R=(u^(2)sin2theta)/gimplies Rpropu^(2)/G`
since `R_(E)=R_(p):. 25/g_(e)=9/g_(p)`
`:. G_(p)=9/25xx9.8=3.5ms^(-2)`


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