A lunar lander is descending toward the moon’s surface.Until the lander reaches the surface, its height above the surface of themoon is given by y(t) = b - ct + dt2, where b = 800 m is the initialheight of the lander above the surface, c = 60.0 m/s, and d = 1.05 m/s2.(a) What is the initial velocity of the lander, at t = 0? (b) What is thevelocity of the lander just before it reaches the lunar surface?

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A: The magnitude of final velocity. Given, Initial speed of the projectilevi=8 ms-1Heighth=7.4 m

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A: The given values are, a→=6ti^+7tj^ m/s2r→=15.0i^+35.0j^ mv→=6.40i^+3.30j^ m/st=5.60 s

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Projectile Motion