# Transport: Forces at Work

 The flashcards below were created by user crobertsonx on FreezingBlue Flashcards. forces can change what of an object? the shapespeeddirection what is the unit of force? newtons (N) what is the instrument used to measure forces? a Newton Balance what is the weight of an object? the force on it due to the Earth's gravitational pull what is the mass of an object? the amount of matter that makes up the object what is the gravitational field strength of a planet? the weight per unit mass of an object what is friction? a force that opposes the motion of an object what are three situations in which friction is increased? applying the brakes of a caropening a parachutewearing rubber soled shoes for rock climbing what are three situations in which friction is decreased? making racing cars streamlinedoiling moving parts in a car engineusing an air cushion on an air hockey table what are balanced forces? when equal forces act in opposite directions what is Newton's First Law of Motion in terms of seatbelts? When a car brakes there is a force acting against the car slowing it down.If the passenger was not wearing a seatbelt they would continue to move forwards at constant speed.A seatbelt is therefore used to provide a backwards force to stop the passenger from continuing to move forward at constant speed what is Newton's First Law of Motion? when balanced forces act on an object it remains at rest or continues to move at a steady speed what is Newton's Second Law? When unbalanced forces act on a object the object changes speed.The acceleration due to an unbalanced force depends on the mass of the object.When the force stays constant and the mass increases, the acceleration decreasesWhen the mass stays constant and the force increases, the acceleration increases Authorcrobertsonx ID86572 Card SetTransport: Forces at Work DescriptionTransport: Section 2- Forces at Work Updated2011-05-18T14:37:16Z Show Answers