Resistors examples. Three resistors are connected in series at a common voltage of 300V: R1 = 100ohm, R2 = 200ohm, R3 = 300ohm.
a) calculate the current I in the circuit
b) calculate the ratio of the individual voltages on the resistors, ie: UR1: UR2: UR3
c) verify that: UR1: UR2: UR3 = R1: R2: R3

I will be very happy if someone writes it to me here with an explanation of how they did it.

thank you in advance.

An object moves from the position +34m to the position -15m in 15 seconds. what is it's total displacement? what is it's average velocity?

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.

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