Related Questions

In a engineering, test, a rocket sled is propelled into a target. If the sled's distance d in meters from the target is given by the fomula d = - 1.5 t2+120, where t is the number of seconds after rocket ignition, then how many seconds have passed since rocket ignition when the sled is 10 meters from the target?
A 2.58
B 8.59
C 8.94
D 9.31
What is the minimum escape velocity of rocket to be launched into space ?
A 5 Km/Sec.
B 6 Km/Sec.
C 11 Km/Sec.
D 15 Km/Sec.
ধর, পৃথিবীর ব্যাস বরাবর একটি সুড়ঙ্গ খনন করা হলো এবং পৃথিবীর পৃষ্ঠ থেকে একটি ক্ষুদ্র বস্তুকে সুড়ঙ্গের মধ্যে ছেড়ে দেওয়া হলো বস্তুটি যখন পৃথিবীর কেন্দ্রে পৌঁছাবে তখন মুক্তিবেগ Ve এর সাপেক্ষে বস্তুটির বেগ কত হবে? (imagine that a tunnel is dug along a diameter of the Earth and a small body is dropped into the tunnel from the surface. What will be its speed in terms of the escape speed Ve when it reaches the centre of the Earth?)
A 32Ve
B 12Ve
C 12Ve
D 0
The escape velocity of a body on earth which is independent of its mass is about __________ km/second.
A 3
B 7
C 11
D 15
What is the minimum velocity required for a rocket to overcome earth's gravity and travel into space?
A 18 km\/sec
B 11.2 km\/sec
C 21 km\/sec
D 35 km\/sec
পৃথিবী পৃষ্ঠে একটি ইটের ওজন 81 N. পৃথিবীর অর্ধেক বাসার্ধের সমান উচ্চতায় এবং অর্ধেক বাসার্ধের সমান গভীরতায় ইউটির উপরে পৃথিবীর অভিকর্ষ বলের মান কত হবে?(A brick weighs 81 N on the surface of the earth. What are the earth's gravitational forces act on it at a height of half of the radius of the earth and at a depth of half of the radius of earth, respectively?)
A 36 N and 81 N
B 36 N and 40.5 N
C 36 N and 20.25 N
D 98 and 40.5 N
E 81 N and 81 N
There is still no way to wholly escape _______ the effects on the layers of gases enveloping the earth.
A in
B of
C from
D at
Read the following passage carefully and then choose the right word to complete the sentence that follows. Rockets are very expensive as it can be used only once. Appled scientists have therefore develped a reusable space craft called a space shuttle which takes off like a rocket; however, does no get destroyed as it returns to earth. It can also be used to lunch satellired into space, retrieve them from space if any repairing os required and allow around 8 scientists to crryout experiments in space. The space shuttle does not get.
A flattened
B enlarged
C ruined
D developed
The velocity of air entering in a rocket is _________ as compared to an aircraft.
A Zero
B Less
C More
D Same
The air entry velocity m a rocket as compared to aircraft is
A Same
B More
C Less
D Zero

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