On the earth, a stone is thrown from a h | Class 9 Science Chapter Gravitation, Gravitation NCERT Solutions

Question:

On the earth, a stone is thrown from a height in a direction parallel to the earth’s surface while another stone is simultaneously dropped from the same height. Which stone would reach the ground first and why?

Answer:

The one which was simply dropped down will reach the ground first. If the height was large enough and measurements very accurate the earth continues to spin. Therefore, this stone will fall directly in a straight line joining the initial point on the centre of the earth but the point on the earth’s surface which was directly below the initial point will have moved. The vertical component of velocity of the other stone, which had been hurled parallel to the earth’s surface, is zero.

However, owing to the sphericity of the earth’s surface together with earth’s spin, it will have to fall greater distance in order to reach earth’s surface. Therefore, it will take longer.


Study Tips for Answering NCERT Questions:

NCERT questions are designed to test your understanding of the concepts and theories discussed in the chapter. Here are some tips to help you answer NCERT questions effectively:

  • Read the question carefully and focus on the core concept being asked.
  • Reference examples and data from the chapter when answering questions about Gravitation.
  • Review previous year question papers to get an idea of how such questions may be framed in exams.
  • Practice answering questions within the time limit to improve your speed and accuracy.
  • Discuss your answers with your teachers or peers to get feedback and improve your understanding.

Comments

Comment(s) on this Question

Welcome to the NCERT Solutions for Class 9 Science - Chapter . This page offers a step-by-step solution to the specific question from Excercise 0 , Question 17: On the earth, a stone is thrown from a height in a direction parallel to the earth’s surface w....