C
criMIGNal
Guest
...explanation..THANKS a lot! 
? 1) The condition necessary for the conservation of momentum in a given system is that
a) energy is conserved.
b) one body is at rest.
c) the net external force is zero.
d) internal forces equal external forces.
2) For a system consisting of two particles that undergo a perfectly elastic collision,
a) momentum is conserve but he total energy is not conserve.
b) neither the kinetic energy nor the momentum is conserve.
c) neither the total energy nor the momentum is necessarily conserved.
d) both kinetic energy and momentum are conserved.
3) Which is aways true when the velocity of an object is halved,
a) its acceleration is halved
b) its momentum is halved
c) its kinetic energy is halved
d) its potential energy is halved
4) if the momentum of a body is doubled, what happens to its kinetic energy?
a) double
b) halved
c) quadrupled
d) unchanged
? 1) The condition necessary for the conservation of momentum in a given system is thata) energy is conserved.
b) one body is at rest.
c) the net external force is zero.
d) internal forces equal external forces.
2) For a system consisting of two particles that undergo a perfectly elastic collision,
a) momentum is conserve but he total energy is not conserve.
b) neither the kinetic energy nor the momentum is conserve.
c) neither the total energy nor the momentum is necessarily conserved.
d) both kinetic energy and momentum are conserved.
3) Which is aways true when the velocity of an object is halved,
a) its acceleration is halved
b) its momentum is halved
c) its kinetic energy is halved
d) its potential energy is halved
4) if the momentum of a body is doubled, what happens to its kinetic energy?
a) double
b) halved
c) quadrupled
d) unchanged