A particle is thrown upwards. It attains a height (h) after 5 seconds and again after 9s comes back. What is the speed of the particle at a height h?

Asked by Last Modified  

1 Answer

Learn Physics +1

Follow 1
Answer

Please enter your answer

Abhinav Raj

Maths Tutor

Total time taken by the particle to go up and come back = 5+9 =14s. Therefore it must take 7s to go up and 7s to come down. From first law, we know v=u+at At the top point velocity will be zero. Therefore v=0. 0=u-10*7 (taking a=g=-10m/s², negative sign indicates that acceleration is in downward...
read more
Total time taken by the particle to go up and come back = 5+9 =14s. Therefore it must take 7s to go up and 7s to come down. From first law, we know v=u+at At the top point velocity will be zero. Therefore v=0. 0=u-10*7 (taking a=g=-10m/s², negative sign indicates that acceleration is in downward direction). Solving the equation we will get u=70m/s. It is given that after 5s its height was h. Again applying first law. v=u+at v=70-10*5 v= 20m/s Particle speed was 20m/s in upward direction at height h after 5s of throwing. read less
Comments
Dislike Bookmark

Related Questions

how many type of rcc beam are there?
The main types of RCC beams 1) Simply supported beam : supported at both the ends and free to rotate. 2) Fixed beam : Fixed at both the ends and cannot rotate. 3) Cantilever beam : Fixed at one end and...
Rahul
The moment of inertia of a body about a given axis is 1.2kgm^2 . Initially the body is at rest. In order to produce a rotational kinetic energy of 1500J, an angular acceleration of 25rad/second ^2 must be applied about that axis for a duration of
https://vz-3ad30922-ba4.b-cdn.net/5c5745eb-a83f-462e-81ce-efa283abc822/play_480p.mp4
Abu
Fixity is always needed for rotational motion?
Yes for pure rotation, the distance between two particles will always remain constant.
Rahul Srivastava
What is the correct definition and formula of ohms law.?
At a constant temperature, the potential difference across A conductor is directly proportional to the Current passing through it. V ∝I, V=IR. V/I=R
Ajay Singh
Which of the following is the most precise device for measuring length: (a) a vernier callipers with 20 divisions on the sliding scale. (b) a screw gauge of pitch 1 mm and 100 divisions on the circular scale. (c) an optical instrument that can measure length to within a wavelength of light?
C
Abhay
0 0
View Comments9

Now ask question in any of the 1000+ Categories, and get Answers from Tutors and Trainers on UrbanPro.com

Ask a Question

Related Lessons

Why does water look colourless?
The water is, in fact, not colourless. Even pure water has a slight blue tint to it, best seen when looking through a long column of water. In detail, the absorption of light in water is due to the way...

Avinash Kumar

0 0
View Comments0
Lami's theorem for forces in equilibrium

Rajan Mittal

0 0
View Comments0
Why There Is A Bigger Hole (Compare To Other Two) In A Electric Socket?
Point 1: For case for ground pin. Also ground pin is larger that other two pins so that it would be the first to go into the hole and the last to come out of the hole just for sake of safety Point 2:...

Sujoy Das

3 0
View Comments0
What is the difference between centrifugal force and centripetal force ?
For any body to move in a circular path , there exist a force without which it cannot move in circular path. Just imagine you are holding a ball tied with rope and you are rotating it in a circular path. You...
A

Arun Pratap Singh

0 0
View Comments0
Tension
Tension is a special type of force which is applicable in a stretchable body like rope or string. Its direction is towards the pulley. If rope or chain is massless,frictionless or smooth, then tension...

Shivendra Kumar

4 0
View Comments0

Recommended Articles

6 Healthy Habits of School Children

While schools provide formal education to the children, the home is where they start learning about things informally. Parents think that schools will take the initiative to educate their children. Well, this is partially true, as parents also play an essential role in bringing up their child. For the development of particular...

Read full article >

5 Engaging Activities For Children To Get...

Learning for every child starts from a very young age. While the formal methods include school curriculums and private lessons, the informal methods include dancing, music, drawing, and various fun-filling activities. Playing games and practising these types of activities helps the children get out of boredom and...

Read full article >

6 Exam Hall Tips To Follow, For Every Good Student

Appearing for exams could be stressful for students. Even though they might have prepared well, they could suffer from anxiety, tension etc. These are not good for their health and mind. However, following a few exam preparation tips can save them from all these and help them to score good marks. Let’s find out all...

Read full article >

Science, Arts Or Commerce - Which One To Go For?

Once over with the tenth board exams, a heavy percentage of students remain confused between the three academic streams they have to choose from - science, arts or commerce. Some are confident enough to take a call on this much in advance. But there is no worry if as a student you take time to make choice between - science,...

Read full article >

Find Class 11 Tuition near you
Class 11 Tuition in Delhi
Class 11 Tuition in Bangalore
Class 11 Tuition in Hyderabad
Class 11 Tuition in Kolkata
Class 11 Tuition in Mumbai
Class 11 Tuition in Chennai
Class 11 Tuition in Pune
Class 11 Tuition in Gurgaon
Class 11 Tuition in Noida
Class 11 Tuition in Jaipur

Looking for Class 11 Tuition ?

Learn from the Best Tutors on UrbanPro

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you