8. Considere las masas mı = 20kg y m2 = 18 kg en el sistema representado en la figura. Si el coeficiente de fricción cinética es 0.1 y el ángulo de
inclinación e es 30°, encuentre (a) la aceleración del sistema y (b) la
tensión en la cuerda que une las dos masas.

Which statement best describes resistance? resistance is a. how well a current will flow in a material and is measured in volts. b. how well a material conducts an electrical charge and is measured in ohms. c. the ability of a material to attract a positive charge to create a current. d. the ability of a material to repel neutral charges and is measured in ohms.

Contrast the force of gravity between these pairs of objects a 1 kg mass and a 2 kg mass that are 1 m apart and two 2 kg masses that are 1 m apart

If an inclined plane is 5 m long and 2 m high, what is its mechanical advantage? a. 2.5 b. 3 c. 7 d. 10