Sarthaks Test
0 votes
in Physics by (8.6k points)

A girl riding a bicycle along a straight road with a speed of 5 m s–1 throws a stone of mass 0.5 kg which has a speed of 15 m s–1 with respect to the ground along her direction of motion. The mass of the girl and bicycle is 50 kg. Does the speed of the bicycle change after the stone is thrown? What is the change in speed, if so?

1 Answer

0 votes
by (13.6k points)
selected by
Best answer

Yes, due to the principle of conservation of momentum. Initial momentum = 50.5 × 5 kg m s–1 

Final momentum = (50 v + 0.5 × 15) kg m s–1

v = 4.9 m s-1, change in speed = 0.1 m s–1

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.