A bullet of mass 0.012 kg and horizontal speed 70 ms–1strikes a block of wood of mass 0.4 kg and instantly comes to rest with respect to the block. The block is suspended from the ceiling by means of thin wires. Calculate the height to which the block rises. Also, estimate the amount of heat produced in the block.

Asked by Last Modified  

1 Answer

Learn Additional Exercise 6

Follow 1
Answer

Please enter your answer

Mass of the bullet, m = 0.012 kg Initial speed of the bullet, ub = 70 m/s Mass of the wooden block, M = 0.4 kg Initial speed of the wooden block, uB = 0 Final speed of the system of the bullet and the block = ν Applying the law of conservation of momentum: For the system of the bullet and the wooden...
read more
Mass of the bullet,m= 0.012 kg Initial speed of the bullet,ub= 70 m/s Mass of the wooden block,M= 0.4 kg Initial speed of the wooden block,uB= 0 Final speed of the system of the bullet and the block = ν Applying the law of conservation of momentum: For the system of the bullet and the wooden block: Mass of the system,m' = 0.412 kg Velocity of the system = 2.04 m/s Height up to which the system rises =h Applying the law of conservation of energy to this system: Potential energy at the highest point = Kinetic energy at the lowest point = 0.2123 m The wooden block will rise to a height of 0.2123 m. Heat produced = Kinetic energy of the bullet – Kinetic energy of the system = 29.4 – 0.857 = 28.54 J read less
Comments

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

Ask a Question

Recommended Articles

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 >

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 >

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 >

With the mushrooming of international and private schools, it may seem that the education system of India is healthy. In reality, only 29% of children are sent to the private schools, while the remaining head for government or state funded education. So, to check the reality of Indian education system it is better to look...

Read full article >

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