Get free access to over 100,000 answers and learning tools with WyzAnt!

Search 82,940 tutors

# Newton's Second Law of Motion

### Written by tutor R Bruce N.

Newton defined one of the most important physics relationships ever.

He found that when an external force acts on an object, then that object accelerates - and the rate of acceleration is proportional to the mass of the object.

F=m*a

If the force is in line with current motion then the object goes faster.

If the force is in the opposite direction, then the object slows down.

Zero external force means no acceleration. That could mean constant velocity or it stays at rest.

It's obvious, isn't it? If you try to push a toy car, it's easy and it accelerates a lot.

Oops, it's heavy!? NO Sweat!! I'm a big guy -I can handle this!

Try the same with a real car – much more mass and it's harder to get it going.

Anybody got a buck for gas?

Sign up for free to access more Science resources like . WyzAnt Resources features blogs, videos, lessons, and more about Science and over 250 other subjects. Stop struggling and start learning today with thousands of free resources!
Don't wait until it's too late! Get help from our Science tutors.
Josh B.

## Message Josh B.

Send Josh B. a message explaining your needs and you will receive a response by email.

Please enter the tutor's email address.
Please enter the student's email address.
Please describe how you heard about us.
I have read and agree to the terms of use. *
Jac S.

## Message Jac S.

Send Jac S. a message explaining your needs and you will receive a response by email.

Please enter the tutor's email address.
Please enter the student's email address.
Please describe how you heard about us.
I have read and agree to the terms of use. *
Phil S.

## Message Phil S.

Send Phil S. a message explaining your needs and you will receive a response by email.

Please enter the tutor's email address.
Please enter the student's email address.
Please describe how you heard about us.
I have read and agree to the terms of use. *