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

3505 Views

See similar Physics GCSE tutors

Related Physics GCSE answers

All answers ▸

Explain Newton's laws of motion


A note was played on an electric keyboard. The frequency of the note was 440Hz. What does a frequency of 440 Hz mean?


A musical instrument produces a sound wave with a frequency of 1000 Hz. The sound wave has a wavelength of 0.34 m in air. Calculate the speed of the sound wave in air.


A person weighs 620N on Earth. The gravitational constant on Mars is 3.8m/s^2. How much does this person weigh on Mars?


We're here to help

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