GS DO NOW Forces

_______ is an attractive force that exists between all objects that have mass. (Hint: page 96)

According to the ______, all objects are attracted to each other with a force that depends on the masses of the objects and the distance between them. (Hint: page 97)

The ______ of an object is the gravitational force exerted on an object. (Hint: page 98)

REVIEW: Complete the table. (Hint: page 98)

g

h

i

j

f

vector

amount of matter

mass balance

scalar

newton

gravitational force

kilogram

changes with location

spring balance

does not change with location

REVIEW: Complete the table. (Hint: page 98)

a

b

c

d

e

scalar

kilogram

does not change with location

changes with location

newton

spring balance

mass balance

gravitational force

vector

amount of matter

______ is a force that opposes the movement between two surfaces in contact. (Hint: page 99)

You push on a heavy box and the box doesn’t move. The friction that acts on it is called... (Hint: page 99)

You push on a heavy box the box is sliding on the floor. The friction that acts on it as it is moving is called... (Hint: page 99)

An ______ is the force exerted by a material when it is stretched or compressed. (Hint: page 101)

A ______ force is a pulling force applied to an object that can make the object stretch. (Hint: page 99)