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A plane travelling north at 200 m/s turns and then travels south at 200 m/s. The change in its velocity is:

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Important Questions on Physics

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What happens to the gravitational force between two objects if the mass of one object is doubled and the distance between them is also doubled?
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In a group of boys, 25 play volleyball, 20 play badminton and 10 boys play cricket. Five boys play all the three games. 8 boys play atleast two of the three games. How many of them play only one game? 
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1 horsepower = approximately _____ watts.
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In an examination 51% students fail in English and 45% fail in Maths. If 21%students fail in both the subjects, then 169 students pass the examination. What is the total number of students taking the exam?
 
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Why do water droplets always take a round shape when dropped onto plane surfaces?
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Which of the following is NOT one of the great paradigms of biology?
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A boy completes one round of a circular track of diameter 200 m in 30 s. What will be the displacement at the end of 3 minutes and 45 seconds?
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A crate resting on a rough horizontal floor is to be moved horizontally. The coefficient of static friction is 0.40. To start the crate moving with the weakest possible applied force, in what direction should the force be applied?
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Which of the following is not a benefit of planning?
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A stone is thrown outward from the top of a 59.4 m high cliff with an upward velocity component of 19.5 m/s. How long is stone in the air?
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To measure the mass of a planet with the same radius as Earth, an astronaut drops an object from rest (relative to the planet) from an altitude of one radius above the surface. When the object hits its speed is 4 times what it would be if the same experiment were carried out for Earth. In units of Earth masses, the mass of the planet is:
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A 0.50 kg object moves in a horizontal circular track with a radius of 2.5 m. An external force of 3.0 N, always tangent to the track, causes the object to speed up as it goes around. The work done by the external force as the mass makes one revolution is:
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The first step in the planning process is to _____.
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A 5 kg concrete block is lowered with a downward acceleration of 2.8 m/s2 by means of a rope. The force of the block on the rope is:
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Are the Directive Principles enforceable in the Courts?
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Finding the location of a given item in a collection of items is called ......
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Which part of the Constitution directs the State to establish Panchayati Raj in the country?
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Under Constitutional Article 343, which is the official language of the Union?
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Measurement of performance of under actual field/working condition is known as
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Canada Trust's statement "To be the best Personal Financial Company" is an example of a: