Rope (initially vertical) va flexible, uniform rope of mass m and length l is initially held motionless over frictionless ice, with one end just touching the ice. at the bottom of the rope is a very small, frictionless ramp that causes the rope to end up sliding horizontally on the ice with velocity v. what is the magnitude of v?

Explanation:

Given that

Mass = m

Length =L

When rope is vertical then potential energy

u₁ = m g h            

h = L/2    Center of mass of rope is at L/2 distance from ground.          

u₁ = m g L/2            

The final potential energy

u₂=0  (because h will become zero)

Lets the speed speed become V

From energy conservation

a small object of mass 3.66 g and charge -17.6 µc is suspended motionless above the ground when immersed in a uniform electric field perpendicular to the ground. what are the magnitude and direction of the electric field?

no sign of dia of fuel cell