MYTUTOR SUBJECT ANSWERS

153 views

Trolley A weighs 5kg and is moving at 15m/s to the right. It collides with a stationary Trolley B, weighing 10kg more than Trolley A. After the collision they move off together. Calulate the velocity that they move off with.

To start with, we should work out all of the quantities we need: 

Mass of Trolley A:  MA= 5kg 

Mass of Trolley B: B weighs 10kg more than A 

--> Therefore MB= 10 + 5 = 15kg 

Mass of Both Trolleys together: MAB = 15 + 5 = 20kg

Initial Velocity of A: VA= 15 m/s 

Initial Velocity of B: VB= 0 m/s

By the conservation of momentum, we know that the total momentum of a closed system is unchanged for any process. Thus the initial and final momenta of the two trollies combined are the same, ie:

PA + PB = PAB where P is momentum

We know that momentum P = mv

Therefore:

MAVA + MBVB = MABVAB

From above, we know all of these quantities except for VAB which is the quantity we need to find for the answer. Thus we can substitute in all of the values and find VAB:

(5x15) + (15x0) = (20xVAB)

75 = 20VAB

VAB = 75/20 = 3.75 m/s

Joshua D. GCSE Maths tutor, 11 Plus Maths tutor, IB Maths tutor, 13 p...

5 months ago

Answered by Joshua, a GCSE Physics tutor with MyTutor

Still stuck? Get one-to-one help from a personally interviewed subject specialist

101 SUBJECT SPECIALISTS

£18 /hr

Hannah C.

Degree: Chemistry (Masters) - Durham University

Subjects offered: Physics, Maths+ 2 more

Physics
Maths
German
Chemistry

“About me I am a Chemistry student at Durham university. I am a friendly and paitient tutor, and I belive that anyone can do Maths and Science with practice! I hope to make Science and Maths more approachable and understandable (as wel...”

MyTutor guarantee

£18 /hr

Matthew C.

Degree: Geography (Bachelors) - Oxford, St Catherine's College University

Subjects offered: Physics, Geography+ 1 more

Physics
Geography
Chemistry

“Hi, I'm Matt!I'm currently in my second year at Oxford University studying Geography. I achieved 3 A*'s in Geography, Physics and Chemistry at A-level and have a real interest and passion in these subjects. I was also involved in a t...”

£20 /hr

Jordan H.

Degree: MPhys Physics with Professional Experience (Masters) - Exeter University

Subjects offered: Physics, Maths+ 2 more

Physics
Maths
Chemistry
Biology

“Hi, I'm Jordan, a first year Physics undergraduate hoping to help both A-level and GCSE students in Maths and Physics.”

About the author

Joshua D.

Currently unavailable: for regular students

Degree: Materials Science (Masters) - Oxford, Corpus Christi College University

Subjects offered: Physics, Maths+ 4 more

Physics
Maths
French
Chemistry
.PAT.
-Personal Statements-

“About Me Hi! I'm an Undergraduate studying Materials Science at the University of Oxford, about to begin my second year of study. I have a passion for the Physical Sciences - in particularMaths, Physics and Chemistry, and am keen to ...”

You may also like...

Posts by Joshua

How can I impress the examiner in the writing paper of my GCSE exam?

Solve the equation log(1-x) - log(x) = 1 where log() is the logarithmic function, base 10.

Trolley A weighs 5kg and is moving at 15m/s to the right. It collides with a stationary Trolley B, weighing 10kg more than Trolley A. After the collision they move off together. Calulate the velocity that they move off with.

Other GCSE Physics questions

What is convection?

Describe the energy changes as electricity is produced in a fossil fuel station.

What is the wavelength of a wave travelling at 20ms^-1 with a time period of 0.2s

what are the energy changes when a car rolls from the top of a hill to the bottom? Name two forces that would slow the acceleration of the car?

View GCSE Physics tutors

Cookies:

We use cookies to improve our service. By continuing to use this website, we'll assume that you're OK with this. Dismiss

mtw:mercury1:status:ok