I have some homework that is due on Wednesday (so I have some time to finish this), but I'm trying to get most of it done soon. I'm having trouble answering some Newton's laws questions and I don't understand why my answers are not correct. Here is what I have thus far:(adsbygoogle = window.adsbygoogle || []).push({});

You push a box horizontally along level ground at constant velocity. The magnitude of the friction force from the ground on the box is EQUAL TO the magnitude of your force BECAUSE OF NEWTON'S SECOND LAW.

You are standing on a hill where the ground is sloped. The magnitude of the normal force from the ground on you is EQUAL TO the magnitude of the normal force from you on the ground BECAUSE OF NEWTON'S THIRD LAW.

You are standing at a place where the ground is level. The magnitude of your weight is EQUAL TO the magnitude of the normal force from the ground on you BECAUSE OF NEWTON'S THIRD LAW.

You push a box horizontally along level ground but friction is causing the box to slow down. The magnitude of the friction force from the ground on the box is GREATER THAN the magnitude of your force BECAUSE OF NEWTON'S SECOND LAW.

You are facing your (very large and very strong) friend, Commander Worf. Worf gets very angry and pushes you to the ground. Worf remains stationary (a = 0). The magnitude of the force from Worf on you is EQUAL TO the magnitude of the force from you on Worf BECAUSE OF NEWTON'S THIRD LAW.

You are standing on a hill where the ground is sloped. The magnitude of the normal force from the ground on you is EQUAL TO the magnitude of your weight BECAUSE OF NEWTON'S THIRD LAW.

The parts in caps are where I have to fill in answers. I have thought every single one of these over and over and I keep coming up with these answers, yet my online homework system tells me that it's wrong. Can anyone tell me where I'm going wrong and why? Any input is appreciated. Thanks.

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Newton's second and third law questions Where am I wrong?

**Physics Forums | Science Articles, Homework Help, Discussion**