Homework Help: physics

Posted by Breanna on Thursday, June 30, 2011 at 3:45pm.

A force of 20 N is needed to overcome a frictional force if 5 N and accelerate a 3 kg mass across a floor. What is the acceleration of the mass?

physics - Damon, Thursday, June 30, 2011 at 4:01pm
F = m a
F = 20-5 = 15N
so
15 = 3 a
a = 5 m/s^2

Answer this Question

Related Questions

Mechanics - A force of 25N causes an acceleration of 2m/s^2 when acting on a 7kg...
physics - because of friction, a constant force of 20 N is needed to slide a box...
physics - If only external forces can cause the center of mass of a system of ...
Physics - If a horizontal force of 200 N is applied to a 430 N object, causing ...
Physics ASAP - A block of weight 20 N is pushed with a force of 30 N through a ...
Physics - A horizontal force of 234 N causes a 350 N object to accelerate across...
Physics - A person pushes a 19.5-kg shopping cart at a constant velocity for a ...
Physics - A person pushes a 23.4-kg shopping cart at a constant velocity for a ...
physics - A person pushes a 10.5-kg shopping cart at a constant velocity for a ...
Physics - What force would be needed to accelerate a 0.040-kg golf ball at 20.0 ...

For Further Reading

First Name:
School Subject:
Answer: