page34

PhySP18SS6.5.26 Pulling the cart. No work by gravity (mg) because it is 90° to the displacement vector (∆x). THe force of pull does positive work (cosine 0 = 1) and the friction does negative work (cosine 180° = (-1)).

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

w

Connecting to %s