Question
What is the minimum escape velocity of rocket to be
launched into space?Solution
On the surface of the Earth, the escape velocity is about 11.2 kilometers per second 06.96 mi/s), which is approximately 34 times the speedof sound(Mach34) andseveral timesthemuzzlevelocity ofarifle bullet (up to 1.7 km/s). However, at 9,000 km altitude in "space", it is slightly less than 7.1 km/s. In physics,escapevelocityisthespeedatwhichthe kinetic energy plus the gravitational potential energy of an object is zero.
If (sin 3A sec 6A = 1) , then what will be the value of cos 6A?
What is the value of cosec30° sec30°?
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- If 2cosec 2  A – cot 2 A = 5 and 0 o < A < 90 o , then find the value of ‘A’.
Find the maximum value of 14 sin A + 24 cos A.
If sin A - cos A = 3/7, then find value of sinA + cos B, where A is an acute angle.
If 4sin² θ = 3(1+ cos θ), 0° < θ < 90°, then what is the value of (2tan θ + 4sinθ - secθ)?
If tan θ + cot θ = 2 where 0 < θ < 90 ; find the value of tan17 θ + cot19 θ.
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