Group al
1 two connected masses m = 400g and m2 = 550g are such that my moves down an inclined
plane and m, moves along a horizontal surface. the string is light and inextensible and the
coefficient of kinetic friction between m, and the inclined plane is 0.35 while the coefficient
of kinetic friction between m, and the horizontal surface is he when 8 = 45° the masses
move at a constant speed.
a) determine hk
b) calculate the acceleration ife is raised to 50°.

This is important. 1. which of the following is an si base unit for measuring length? (2 points) inch gram meter mole 2. which of the following units for distance is an si unit? (2 points) centimeter foot inch yard 3. which of the following tools should a scientist use to measure an object in meters? (2 points) electronic balance pan balance tape measure thermometer

Select the three ways that the parallel-plate capacitor differs from a car battery.

Consider a uniformly charged ring in the xy plane, centered at the origin. the ring has radius a and positive charge qdistributed evenly along its circumference. a)what is the direction of the electric field at any point on the z axis? . b)what is the magnitude of the electric field along the positive z axis? use k in your answer, where k=14πϵ0. d)the ball will oscillate along the z axis between z=d and z=−d in simple harmonic motion. what will be the angular frequency ω of these oscillations? use the approximation d≪a to simplify your calculation; that is, assume that d2+a2≈a2. express your answer in terms of given charges, dimensions, and constants