A vertical pole of length `7.5 m ` casts a shadow 5 long on the ground and at the same time a tower casts a shadow 24 m long. Find the height of the tower.
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A man of height 1.8 m is standing in front of a wall. The sun is exactly behind him. His shadow has a length 1.5 m on the ground and 0.75 m on the wal
Correct Answer - `2.57 m `
2 Answers 4 views
Two places A and B on the same longitude are h km apart along the surface of the earth, A is at the equator. The shadow of a vertical pole is zero at
Correct Answer - `R=(h)/(tan^(1)(1)/(2))`
2 Answers 1 views
Two bar magnets are in line. One has a magnetic length of `0.08m` and pole strength of 5Am and the other has a magnetic length of `0.04m` and pole str
Correct Answer - `7.4 xx 10^(-6)J`
2 Answers 1 views
If a pole 6 meter high casts a shadow 2√3 meter long on ground, then the angle of elevation of sun is –
Correct answer is (D) 60°
2 Answers 2 views
A ladder of length 50 m rests against a vertical wall, at a height of 30 m from the ground. Find the inclination of the ladder with the horizontal. Al
Correct Answer - 40 m
2 Answers 1 views
20. A coconut of mass \( 2 Kg \) is falling from a coconut free of height \( 10 m \). Find the potential energy, kinetic energy and total energy at the following points. \( \left( g =10 m / s ^{2}\right) \) a) Before falling from the coconut tree. b) Just before hilting the ground. c) At a height \( 4 m \) from the ground. d) Which law is evident from this example?
(a) Given m = 2 kg h = 10 m Potential energy at before falling from the coconut tree. u = mgh u = 2 x 10 x 10 u = 200 joule Kinetic energy will...
2 Answers 1 views
A tower stands vertically on the ground. From a point on the ground, 20m away from the foot of the tower, the angle of elevation of the top of the tow
Correct Answer - `34.64 m`
2 Answers 1 views
On a horizontal plane there is a vertical tower with a flag pole on the top of the tower. At a point 9 metres away from the foot of the tower the angl
Correct Answer - `5.19 m, 10.38 m`
2 Answers 1 views
From the top of a vertical tower, the angles of depression of two cars, in the same straight line with the base of the tower, at an instant are found
Correct Answer - `136.6 m`
2 Answers 1 views
A body released from height ‘h’ takes time’t’ to reach the ground. After time t/2, its height from the ground is
C) \(\cfrac{3h}4\)
2 Answers 1 views