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 Class XI-XII Tuition (PUC)

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

Why does a cyclist lean to one side, while going along curve? In what direction does he lean?
centripetal force required to turn in a curve.
Meenakshi
0 0
8

What is the difference between position vector and displacement vector?
Change in position vector is displacement.
Rahul Srivastava

What is the correct definition and formula of ohms law.? 
Ohms:- Any electric circuit , current flowing in the circuit is directly proportional to the voltage applied and inversly perportional to the resistance in the circuit. I- CURRENT V- VOLTAGE R - RESISTANCE I = V/R
Ajay Singh

Can you add three unit vectors to get a unit vector? Does the answer change if two unit vectors are along coordinate axis? Please give example.
If two unit vector in same direction (along),third unit vector in opposite direction situated after applying law's of vector addition along coordinate we will gate unit vector..which is result of three...
Deepika T.
0 0
6

What is terminal velocity 

 

 

 

 

 
Terminal velocity is the fastest speed something can fall through the air. It happens when the force pulling it down (gravity) is balanced by the force pushing up (air resistance), so it doesn’t...
Kishore

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

Ask a Question

Related Lessons

Newton's Laws
Newton's Laws -- 1st Law -- the body is in rest until the experience any type of external force. I.e F = 0. Consider a following. Example. Newton's 2nd law-- when we apply any type of force...

Sachin Kakaso Kumbhar

0 0
0
Acceleration due to gravity and its variation with altitude, depth and rotation of earth   I. Expression for acceleration due to gravity: Consider earth to be a sphere of radius 'R' and mass 'Me'....
R

Ratan Deshpande

0 0
0
Vector components in 3D

Rajan Mittal

0 0
0
Parallelogram law of vector addition

Rajan Mittal

0 0
0
Dual Nature of Radiation and Matter
Cathode Rays Cathode rays are the stream of fast moving electrons. These rays are produced in a discharge tube at a pressure below 0.01 rom of mercury. Properties of Cathode Rays Cathode rays are...

Akhilesh Kumar

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