+91-87964 74404
FlagBACK
Question icon
Grade 12th passBotany

A ball is thrown up from the top of a tower with an initial velocity of 10 m/s at an angle of 30o with the horizontal. It hits the ground at a distance of 17.3m from the base of tower. Calculate the height of the tower. (g=10m/s2)

Profile image of mayank ranka
5 Years agoGrade 12th pass
Answers icon

2 Answers

Profile image of Vikas TU
5 Years ago
Dear student 
When we draw the diagram of the motion we get a right angled triangle.
We have an angle of 30° and a base of 17.3M.
We will use trigonometric ratios to solve this.
We will use tan.
Tan = Opposite / adjacent
Tan 30° = h / 17.3
h = Tan 30 × 17.3
h = 0.5774 × 17.3 = 9.99 M
Profile image of Vikas Amritiya
5 Years ago

 

The ball is thrown at an angle, θ=30o.
Initial velocity of the ball, u=10 m/s 
Horizontal range of the ball, R=17.3 m
 
We know that, R=u cosθ t,
 where t is the time of flight 
 
⟹t=53​17.3​=2 secs
 
using equation of motion we get:-
−h=ut−21​gt2
 
=10×2−21​10×22=−10
 
⟹ Height of tower, h=10 m

Other Related Questions on botany

question mark
Which of the following compound is produced when ethano (C5H5Oh ) is dehyrated
botany
1 Answer Available

Last Activity: 4 Years ago

question mark
What is the difference between ovary and ovule culture, what are their advantages and disadvantages
 
botany
2 Answers Available

Last Activity: 4 Years ago

question mark
What is Glycolessis ? Explain about Glycolessis and what it's part and functions
botany
1 Answer Available

Last Activity: 4 Years ago

question mark
pls anwernnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn
botany
1 Answer Available

Last Activity: 4 Years ago

question mark
How is ulna a pivot joint a bone is unbendable so how is ulna a pivot joint 
botany
1 Answer Available

Last Activity: 4 Years ago