1. A ciarge of \( 2 \mu \mathrm{C} \) is placed 0.1 m away from another charge of \( -3 \mu \mathrm{C} \). Using Coulomb's law. calculate the force between them. (Assume \( \left.k=8.99 \times 10^{9} \mathrm{~N} \mathrm{~m}^{2} / \mathrm{C}^{2}\right)(5 \mathrm{Marks} \) ) Calculate the electric field at a point where a \( 5 \mu \mathrm{C} \) charge experiences a force of 0.2 N . ( 5 Marks) An 1 C voltage of \( V(t)=220 \sin (100 \pi t) \) is applied to a \( 50 \Omega \) resistor. Calculate the pecie current through the resistor. ( 5 Marks) A capacitor with a capacitance of \( 20 \mu \mathrm{~F} \) is connected in an AC circuit with a frequency of 50 Hz . Calculate the capacitive reactance. ( 5 Marks )

5. Un cuerpo que se mueve con una velocided de \( 10 \mathrm{~m} / \mathrm{s} \) es uniformemente desace:erado hasta detenerse dentro de una distancea de 20 m . a) ¿Cuál es el valor do la desaceleracion? b) ¿Cuánto tiempo viajo antes de detenerse?

Dados los vectores: \( \vec{u}=3 i-j+7 k \) \( \vec{v}=4 i+5 k \) \( \vec{w}=-5 i+2 j-k \) El producto \( (\vec{v} \cdot \vec{w}) \) multiplicado por el vector \( \vec{u} \) está representado por:

Two forces of magnitude 30 newtons \( (N) \) and 60 N act on an object at angles of \( 30^{\circ} \) and \( -45^{\circ} \) with the positive \( x \)-axis as shown in the figure. Find the direction and magnitude of the resultant force; that is, find \( F_{1}+F_{2} \). \( F_{1}+F_{2}=(\square) \mathbf{i}+(\square) \mathbf{j} \) (Simplify your answer, including any radicals. Use integers or fractions

5.- Un cuerpo que se mueve con una velocidod de \( 10 \mathrm{~m} / \mathrm{s} \) es uniformemente desacelerado lasta detenerse dentro de una distanca de 20 m a) ¿Cual es el valor de la desaceleración? b) ¿Cuánto diempo viajó antes de detenerse?

1. A ciarge of \( 2 \mu \mathrm{C} \) is placed 0.1 m away from another charge of \( -3 \mu \mathrm{C} \). Using Coulomb's law. calculate the force between them. (Assume \( \left.k=8.99 \times 10^{9} \mathrm{~N} \mathrm{~m}^{2} / \mathrm{C}^{2}\right)(5 \mathrm{Marks} \) ) Calculate the electric field at a point where a \( 5 \mu \mathrm{C} \) charge experiences a force of 0.2 N . ( 5 Marks) An 1 C voltage of \( V(t)=220 \sin (100 \pi t) \) is applied to a \( 50 \Omega \) resistor. Calculate the pecie current through the resistor. ( 5 Marks) A capacitor with a capacitance of \( 20 \mu \mathrm{~F} \) is connected in an AC circuit with a frequency of 50 Hz . Calculate the capacitive reactance. ( 5 Marks )