2.4,2.5 Mass & Weight, Forces (Hooke's Law)

Define mass.

amt of matter in an object

Define weight.

effect of a gravitational field on a mass

What is used to measure weight?

spring balance

Types of Forces
1. F__ forces: g__, e__, magnetic i.e. no contact

field, gravitational, electric

Types of Forces
2. C__ forces: p__, pull, t__, hold, rotate, lift, f__

contact, push, twist, friction

What is Newton’s First Law?

a body’s velocity will remain at rest or move at a constant velocity unless acted upon by a resultant force

Newton’s First Law is also known as?

law of inertia

What is Newton’s Second Law?

If a resultant force is applied to an object, it will accelerate in the direction of the force

Newton’s Second Law has a formula…

F = ma

What is Newton’s Third Law?

when an object exerts a force on another object, the second object exerts a force of the same magnitude & type in the opp direction

Hooke’s Law states…

extension of a spring is directly proportional to stretching force applied

Hooke’s Law has a formula…

F = kx

What is the question mark?

elastic limit

What is the question mark?

elastic region

What is the question mark?

plastic region

What is the question mark?

limit of proportionality

What is X?

extension

How is this spring arranged and how does it affect extension?

series, doubles extension

How is this spring arranged and how does it affect extension?

parallel, halves extension

Define limit of proportionality.

max load after which ext. is no longer proportional to the load