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Section 3
What Do you think?

Force is pressure being put on an object

You need more force to move a bowling ball as far as a tennis ball

Physics talk
 * Newton's Second Law
 * The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
 * Acceleration= Force/mass
 * a= F/m
 * SI unit: Newton
 * Force is expressed in newtons (N)
 * A newton is the force required to make one kg of mass accelerate at 1m/(s^2)
 * Acceleration and unbalanced forces
 * Newton's second law tells you that accelerations are caused by unbalanced forces
 * If you were to push a truck it still accelerates an immeasurable amount
 * Acceleration gets less and less as mass gets larger
 * Calculations using Newton's Second Law of Motion
 * [[image:Picture_12.png width="449" height="362"]]
 * you must determine the number of significant figures in a measurement
 * You DONT need the 0 in 1.30
 * Gravity, Mass, Weight, and Newton's Second Law
 * You can't see forces but you know they are there
 * Weight: The force of gravity acting on an object
 * it is dependent on the mass of the object and the acceleration due to gravity
 * How to calculate the weight of an object:
 * F

Checking Up
 * 1) Newton's Second Law describes how things accelerate when forces are changing them
 * 2) The more mass it has; the less acceleration

Physics To Go

What do you think now? Force =ma The same amount of force can affect a tennis ball and bowling ball differently because they have different masses. It takes more force to move a bowling ball then a tennis ball.

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