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HOMEWORKS

This page gives you the details of Home Works in Physics given to Class XI B by me at School.
This will serve as a ready reference in case you forget the details of home works or was absent on the day a home work was given. So, becoming absent is no more an excuse for not doing homework


This page started on 1 August 2010. Therefore, previous home-works are not available here.

Home Work for the week 2 - 7 August 2010
Solve the 1 Unit Test Question Paper correctly and submit on 9 August 2010

NUMERICAL PROBLEMS FROM PROJECTILE MOTION
I. HORIZONTAL PROJECTILE
  1. A hiker stands on the edge of a cliff 490 m above the the ground and throws a stone horizontally with an initial speed of 15 m/s. Neglecting air resistance, find the time taken by the stone to reach the ground an the speed with which it hits the ground. (Ans. 10s,99.1 m/s)
  2. A bomb is dropped from an aircraft. when it is directly above the target at a height of 1000m.  The aircraft is moving with a velocity 500 km/h. Will the bomb hit the target?. If not, by how much distance will the bomb miss the target? (Ans. No, it will hit a point 1985 m away from the target)
  3. A projectile is thrown horizontally with a velocity v from the top of a tower of height h.  Calculate the velocity of the projectile when it strikes the ground. (Ans.   v 2+ 2gh, tan = 2ghv,  is the angle with v
  4. A stone is dropped from the window of a bus moving at 60 km/h. If the window is 186 cm high, find the distance along the track which the stone moves before striking the ground. (Ans. 10.44 m)
  5. An aeroplane is flying horizontally at a height of 490 m with a velocity of 360 km/h. A bag containing ration is to be dropped to the jawans on the ground. How far from them should the bag be released so that it falls directly over them? (Ans. 1000 m)

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