Sophia (mass 47Kg) is travelling to the right with a velocity of 7.2m/s and ​Neesha (mass 68Kg) is travelling to the left with a velocity 4.8m/s. When ​they meet, they hold hands and travel off together. Give their final ​velocity and direction

We know that p=mv,

So Sophia travels at 7.2 m/s and she has a mass of 47kg so her p is: p=7.2 x 47=338.4 kgm/s

 Neesha travels with a velocity of -4.8 m/s and she has mass of 68kg, so her p is: p= -4.8 x 68= - 326.4 kgm/s

Pinitial=pfinal

ps + pn= mfinal x vfinal

338.4 +(-326.4)=(47+68) x vfinal

12= 115vfinal,   vfinal=0,1m/s

As our velocity is positive, the direction is right. 

Answered by Raquel L. Physics tutor

3738 Views

See similar Physics GCSE tutors

Related Physics GCSE answers

All answers ▸

How do I work out the efficiency of a process from a Sankey diagram?


What are the definitions of a)voltage and b)current?


What is the difference between acceleration, speed and velocity?


As a student rubs his feet along the carpet in his living room, he becomes charged. After this he places his hand on a metal radiator and receives an electric shock. Explain what charge the student obtains, why, and why he receives a shock.


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences