Question

check answers please ( I am to fill in the blanks)
this is for the energy and momentum unit

1. the electric potential energy stored in a spring when it is compressed 10.0 cm is ___ the elastic potential energy stored in the spring when it is stretched 10.0 cm

my answer: greater than

2. it is impossible for two moving objects to have a total momentum of zero. true or false

my answer: true

3. a(n) __ system is a system that is removed from interference from outside sources

my answer: I'm not too sure about this one would it be spring?

Answer 1

Are you sure it is electric potential ???
1.smaller than (there is no electric potential when you compress it 10 cm ?)
But if it wasn't electric but as the second they would be the same
2. false (when they have the same mass and velocity but in the other direction,so the total is zero look for Momentum in Explosions in http://www.antonine-education.co.uk/Pages/Physics_4/Further_Mechanics/FMC_02/FMech_Page_2.htm )
3.an isolated system :D i don't sure

Answer 2

oops I meant elastic not electric

Answer 3

then equal to