Forces
what is a contact force?
Two objects coming into direct physical contact with each other with force applied
calculate net force
4 N left, 20 N right
16 N right
equation for KE>
ke= 1/2mv^2
what is a reference point?
stationary object to compare motion to
newton's 2nd law
f=ma
how do you calculate for net force?
calc net force
10 N right, 4 N left
6 N right
calc KE
m=10 v=5
125 J
what is balanced force?
same force in opp. directions
units for KE
J
equation for force
f=ma
calc net force
15 N right, 35 N left
20 N left
calc KE
m=5 v=15
what is an unbalanced force?
diff forces in opp directions
Units for force
N
calculate force
m= 10 a =20
200 N
calc net force
25 N left, 15 N right
10 N left
calc KE
m=4 v=8
128 J
newton's 3rd law?
forces are equal and opp in pairs
what has a greater effect on KE? Mass or speed?
Speed because it is squared in the equation
calculate force
m=30 a=5
150 N
100 N left, 15 N right
85 N left
calc KE
m=2 v=10
100 J
newton's 1st law?
an object in motion will stay in motion unless acted upon by an unbalanced force
what is ms. mejia's favorite color
pink