Aray of light is travelling from north towards south and it has travelled 49 km until it hit a mirror which reflected the light towards east. the ray of light reflected towards east has travelled 47 km until it hit another mirror which reflected it diagonally towards the initial point which is north. how long is the line reflected towards north diagonally? round the result to two decimals.

As a pendulum bob swings back and forth several times, the maximum height it reaches becomes less and less. this is because more and more of the pendulum bob's energy is being transformed into a. heat energy b. kinetic energy c. potential energy d. kinetic energy and potential energy

Aperson gives a shopping cart an initial push along a horizontal floor to get it moving, and then lets go. the cart travels forward along the floor, gradually slowing as it moves. consider the horizontal force(s) on the cart while it is moving forward and slowing. which of the following statements is correct? (a) both a forward and a backward force are acting on the cart, but the forward force is larger. (b) only a forward force is acting which diminishes with time. (c) both a forward and a backward force are acting on the cart, but the backward force is larger. (d) only a backward force is acting, no forward force.

The law of the conservation of momentum says that the total momentum of any closed and isolated system cannot