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

Does fire's flame have any weight?
Yes, Flame consists of gases and gasses have mass.
Rakesh
What is the difference between position vector and displacement vector?
Change in position vector is displacement.
Rahul Srivastava
According to principle of conservation of energy, the total momentum of a system of masses in any direction remains constant unless acted upon by an external force in that direction. A. True B. False
This is not principle of conservation of energy but it is principle of conservation of momentum.
Ram Niwas Choudhary
Suppose some electricity is flowing through a long straight wire without any insulating coating that gives an electric shock to a person at rest relative to the wire on touching it. Is there a speed with which if the person runs along the wire in the direction of current flowing such that he/she does not experience any shock?
It is an excellent, thought-provoking question! Suppose a person runs along the direction of electron motion with the same speed of an electron. Then for him, electrons are at rest means zero current in...
Souradeep
Is ordinary light a form of energy or is made of particles?
According to Einstein; the light is a particle which emits or absorbs the waves when it travels.
Souradeep

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

Ask a Question

Related Lessons

Work and Energy

Vishesh N.

0 0
0
Todays lessen
Distance travelled in the nth second by a body having uniform motion is given by s= u+a(2n-1)/2

Manoj Dahiya

0 0
0
Vectors
Law of the addition of vectors (1) Parallelogram law of addition of vectors: It states that if two vectors are represented in direction and magnitude by two sides of a parallelogram, then their resultant...

Om Prakash Mishra

1 0
0
NEWTON'S LAW OF GRAVITATION
Newton's Universal Law of Gravitation states that Any two objects exert a gravitational force of attraction on each other. The direction of the force is along the line joining the objects. The magnitude...

Ashis Kumar Panda

1 0
0
Spring Constant

Waris Siddiqui

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 Hyderabad
Class 11 Tuition in Mumbai
Class 11 Tuition in Kolkata
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