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I need help with A stone is thrown at a spedd of 19.6 m/s along horizontal direction from a tower of hieght 490 m. The distance from the foot of the tower to the point where stone hits the ground is

A stone is thrown at a spedd of 19.6 m/s along horizontal direction from a tower of hieght 490 m. The distance from the foot of the tower to the point where stone hits the ground is 

  • Option 1)

    98 m

  • Option 2)

    196 m

  • Option 3)

    392 m

  • Option 4)

    200 m

 
Answers (1)
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As we have learnt,

 

Projectile Projected Horizontally -

R= u .\sqrt{\frac{2h}{g}}
 

- wherein

R= Range of projectile

u= horizontal velocity of projection from height h

 

 

Time taken to reach ground = \sqrt{\frac{2h}{g}} = \sqrt{\frac{2\times490}{9.8}} = 10 sec

Horizontal distance = 4xt = 19.6 x 10 m = 196 m


Option 1)

98 m

Option 2)

196 m

Option 3)

392 m

Option 4)

200 m

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