Wednesday
December 17, 2014

Homework Help: Physics

Posted by Tammy on Wednesday, October 3, 2007 at 2:05pm.

A stack of books rests on a level perfectly smooth surface. A force F acts on the stack and it acclerated at 3m/s^2. A 1kg book is added to the stack. The same force is applied and now the stack accelerates at 2m/s^2. What was the mass of the original stack?

I think i would use F=ma and F=m_total*a

I chose 5N to be the applied force. so F=ma
5=m(3)
m=1.66

then F=m_total*a
5=(1.66+1)(2)
5=5.32
But this isn't valid. What am I doing wrong?

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

physics - How many uniform, identical textbooks of width 25.0 cm can be stacked ...
Physics - I push a stack of six books (each weighting 4 kg) horizontally across ...
Physics 1 - There are six books in a stack, and each book weighs 5 N. The ...
Physics Help2I!!! - There are six books in a stack, and each book weighs 5N. ...
Physics - There are six books in a stack, and each book weighs 5 N. The ...
physics - please help There are six books in a stack, and each book weighs 5 N. ...
PreCal - You have 1000 coins. Start by placing one coin in its own "stack." Next...
Math - Need help on writing an equation. the question is let H represent the ...
physics - A person is standing on an object 10 ft high and his weight is 45 kg...
MATHEMATICS - A piece of notebook paper is about 0.0032 inch thick. If you begin...

Search
Members