MYTUTOR SUBJECT ANSWERS

610 views

If two cars are moving, labelled car A and car B. Car A moves at 15 m/s and B at 10 m/s but car B also accelerated at 2 m/s/s. If the two both travel for ten seconds, which car will travel further?

Well for this question we can use the SUVAT equations. We'll see what values we have and what we're looking for.

So firstly we have the initial speed, often denoted usign the letter u. I'm going to write Au to mean the speed of car A.

Au=15 m/s

Bu=10 m/s

Now we also have the accelration, denoted by a. Car A doesn't change speed so its accelration is zero. Car B acceraltes by 2 m/s/s, so for every second that passes its speed increases by 2 m/s.

Aa=0

Ba=2

We also have the time taken, denoted by t. Both cars move for ten seconds so.

At=10

Bt=10

We're trying to find how far each one goes, this is denoted with the letter s.

As=?

Bs=?

With what we have we should use the SUVAT equation: s=ut+1/2at.

This equation uses the inital speed and the acceleration to find out how far an object has moved. Lets work it out for car A.

As=15 * 10+1/2 * 0 *10

As=15 * 10 = 150 m

Now for car B.

Bs=10*10 + 1/2 * 2 * 10

Bs= 100 + 10

Bs=110 m

So car A moves 150 m and car B moves 110 m, so car A moves further. 

Tom W. GCSE Maths tutor, 13 plus  Maths tutor, A Level Maths tutor, 1...

1 year ago

Answered by Tom, who has applied to tutor A Level Physics with MyTutor


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

104 SUBJECT SPECIALISTS

£20 /hr

Mabast H.

Degree: Physics (Bachelors) - Imperial College London University

Subjects offered:Physics, Maths+ 3 more

Physics
Maths
Further Mathematics
Chemistry
-Personal Statements-

“Undergraduate Physicist with lots of experience in teaching in different fields and age groups, looking to instil a passion for learning into students.”

MyTutor guarantee

£20 /hr

Aminah S.

Degree: Natural Sciences (Bachelors) - Durham University

Subjects offered:Physics, Maths+ 3 more

Physics
Maths
Japanese
Chemistry
Biology

“Chemistry and Physics student at Durham university, here to motivate and support you in developing a solid understanding of your subject. ”

£26 /hr

Ben J.

Degree: Physics and Computer Science (Natural Sciences) (Masters) - Durham University

Subjects offered:Physics, Science+ 3 more

Physics
Science
Maths
Chemistry
-Personal Statements-

“About Me: I'm a Physics and Computer Science student at Durham University, which sounds boring but it's actually really fun.I've got a great knack for making boring things more exciting, which is a good job given my degree title!  I'...”

MyTutor guarantee

About the author

£20 /hr

Tom W.

Degree: Physics (Masters) - University College London University

Subjects offered:Physics, Maths+ 2 more

Physics
Maths
Chemistry
Biology

“About Me: I am an undergraduate student at UCL studying Physics. I've always loved science and maths, particualtly whenever I can see my knowledge applied to the real world. I'm the oldest of four siblings with the youngest finishing...”

MyTutor guarantee

You may also like...

Other A Level Physics questions

What's the difference between a bayron and a meson?

What are the postulates of special relativity?

In a fluorescent tube, how are the atoms in the tube excited?

What determines the acoustic impedance of a material and why is it useful in understanding ultrasound imaging?

View A Level Physics tutors

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

mtw:mercury1:status:ok