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Class 10 Class 12
An aeroplane is flying in horizontal direction with velocity u at a height h. How far from the target, should the bomb be released from it so as to hit the target?

Let the aeroplane be flying at height h in horizontal direction with velocity u.

Let the bomb be dropped from O to hit the target.

Let t be time taken by the bomb to reach the ground at target.

                 

We know,      straight y equals straight y subscript straight o plus straight u subscript straight y straight t plus 1 over straight a straight a subscript straight y straight t squared
∴                   straight h equals 0 plus 0 plus 1 half gt squared

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Distance travelled by bomb in horizontal direction in time t is,

                   straight x equals straight R equals ut equals straight u square root of fraction numerator 2 straight h over denominator straight g end fraction end root

 Bomb must be dropped at a distance= space space straight u square root of fraction numerator 2 straight h over denominator straight g end fraction end root from the target. 
151 Views

Give three examples of vector quantities.

Force, impulse and momentum.
865 Views

Give three examples of scalar quantities.

Mass, temperature and energy
769 Views

What are the basic characteristics that a quantity must possess so that it may be a vector quantity?

A quantity must possess the direction and must follow the vector axioms. Any quantity that follows the vector axioms are classified as vectors. 


814 Views

What is a vector quantity?

A physical quantity that requires direction along with magnitude, for its complete specification is called a vector quantity.
835 Views

What is a scalar quantity?

A physical quantity that requires only magnitude for its complete specification is called a scalar quantity.
1212 Views