An object is 30 cm in front of a converging lens with a focal length of 10 cm. use ray tracing to determine the location of the image. is the image upright or inverted? is it real or virtual?

Inverted

Real

Explanation:

u = Object distance =  30 cm

v = Image distance

f = Focal length = 10 cm

Lens Equation

As, the image distance is positive the image is real and forms on the other side of the lens

As, the magnification is negative the image is inverted

The kinetic energy of the system after the collossion is less than the kinetic energy of the system before the collision. This is because the heat generated from the collision which is a direct consequence of the friction between both vehicles and possibly the road too. This heat energy due to friction is not a conservative form of energy and cannot be regained in another form. So after the collision this energy is lost, thereby reducing the total kinetic energy the system had before the collision.

Explanation:

Collisions as these are inelastic collisions. For inelastic collisions, the total momentum is conserved before and after the collision. The kinetic energy on the other hand is not conserved. This is because in most cases some of the energy is lost due friction in the form of heat.

Elastic collisions on the other hand generally have the total momentum and kinetic energy conserved before and after collision.

Thank you for reading.