SaraNextGen Study App [2022-23]
Last Updated On 23-10-2022 - By Sara

A wooden block of mass 10 g is dropped from the top of a tower 100 m high. Simultaneously, a bullet of mass 10 g is fired from the foot of the tower vertically upwards with a velocity of 100 m/s. If the bullet is embedded in it, how high will the block rise above the top of tower before it starts falling? )

a)

75 m

b)

85 m

c)

80 m

d)

10 m


Question ID - 100305 :-

A wooden block of mass 10 g is dropped from the top of a tower 100 m high. Simultaneously, a bullet of mass 10 g is fired from the foot of the tower vertically upwards with a velocity of 100 m/s. If the bullet is embedded in it, how high will the block rise above the top of tower before it starts falling? )

a)

75 m

b)

85 m

c)

80 m

d)

10 m

1 Answer
5876 Votes
3537

Answer Key : (a) -

(a)

The bullet and block will meet after time

During this time, distance travelled by the block,

Distance travelled by the bullet,

m

Velocity of the bullet before collision,

 m/s

Velocity of the block before collision,

  m/s

Let be the combined velocity after collision

According to the law of conservation of momentum,

or 

(Velocity in upward direction is considered positive)

Solving, we get  m/s

Maximum height risen by the block m

Height reached above the top of the tower is

 m



Next Question :

Sympathetic nerve accelerates heart beat due to

1)

Adrenaline

2)

Nor-adrenaline

3)

Insulin

4)

Glucagon


View Topper Answer

We hope we have given the updated helpful answer / content for your query in an easily accessible format to help you in preparing adequately. We do offer free support materials, 10th maths guide, 10th science guide, 10th tamil guide, 10th social guide, 10th english guide, science 10th guide and also for all the classes books and guide to all the students who sign up for SaraNextGen. Apart from traditional textbook queries, we've got conjointly provided further high order level thinking issues, that are seemingly to be expected in boards and competitive exams. It includes conceptual queries, MCQs, Long and short answer type queries, etc. These Questions are designed to learn each student and academics by providing chapter-wise further issues focusing totally on testing conceptual information with applications. Here, we've got provided a number of the necessary ways in which within which the solutions of all the Questions will profit students of class 1 to 12. If you have any queries, drop a message to us and we will get back to you at the earliest.


SaraNextGen