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

A body is initially at rest. It undergoes one-dimensional motion with constant acceleration. The power delivered to it at time t is proportional to
(i) t1/2 (ii) t (iii) t3/2 (iv) t2
Power=FVCosA=ma.(u+at)Cos0=ma.(0+at).1=ma^2.t. Which is propotionalp to t. So correct answer (ii) t.
Abhay
0 0
5
A lift is accelerated upward. Will the apparent weight of a person inside the lift increase, decrease or remain the same relative to its real weight? If the lift is going with uniform speed, then?
Thd apparent weight of the person will increase. When in uniform speed then acceleration is zero, so no change in weight.
Shubham

What is S.I. UNIT of Viscosity??
Si unit of viscosity is decapoise . Cgs unit is poise . 1 decapoise = 10 poise
Rakesh Chandra

Sun: Largest source of energy is made up of?
Organic molecules.hydrocarbons.fossil fuels.hydrogen and carbon mainly.
Deepika T.
derivation of v2/r=ac
Below sheets has elaborate details of centripetal acceleration:
Indra
0 1
9

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

Ask a Question

Related Lessons

Graphical representation of vectors

Rajan Mittal

0 0
0
The Work-Energy Theorem
1. What is Work? In physics, work is done on an object when a force causes it to move a certain distance. It's a way of transferring energy. Formula (for a constant force): Work (W) is the product...

Atulya Kumar

0 0
0
Lami's theorem for forces in equilibrium

Rajan Mittal

0 0
0
Physics

Prem Kumar Prajapati

0 0
0
The Hidden Force Resisting Every Motion

Rakesh Nair

0 0
0

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 Kolkata
Class 11 Tuition in Hyderabad
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 Ghaziabad

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