Ablock of mass m 5 kg slides with an initial speed vi = 5 m/s to the right toward a ramp of mass m = 20 kg. the ramp itself can also slide without friction on the surface and has a frictionless face that the block can slide upon. the block slides up the ramp so that its center of mass rises a maximum height h, then back down until it is separated from the ramp. let velocities to the left be indicated by a negative
(a) determine the speed vh of the block-ramp system at the instant the block reaches its maximum height on the ramp m/s
(b) determine the height h to which the block's center of mass rises meters
(c) determine the final velocities vf and vr of the block and ramp, respectively final velocity of the block final velocity of the ramp = xm/s x m/s

Part a)

Part b)

Part c)

Explanation:

Part a)

When block reached to maximum height then block and ramp will move together.

so here we will have

Part b)

Now we can use energy conservation to find the height

Part c)

When block and ramp separate finally then we have

also by energy equation

by solving above equations we have

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia