For each of the following: Draw a free body diagram illustrating all forces acting on the object.
Draw a free body diagram illustrating the net force acting on the object.
Determine the friction force exerted on the object.
Determine the coefficient of static friction for object.
1. A wooden box weighing 20. N remains stationary when a force of 8.0 N is exerted in the
(+) horizontal axis.
2. A 30.0 kg block is pushed with a 75N force on a concrete floor at a uniform velocity.
3. A 50.N force is exerted on a 4.0 kg block. The block accelerates at 10. m/s2. Friction is
present within the system.
4. CHALLENGE QUESTION (optional): This is similar to the previous questions but now you
need to figure out vector components using trigonometry. Remember that SOHCAHTOA
stuff!
A 20.0 kg block slides down a 30.0° angle ramp at a uniform velocity.
a. Determine the friction force exerted on the block.
b. Determine the normal force exerted on the block.
c. Determine the coefficient of friction on the surface of the ramp.

i believe the answer would be:

d. violin, clarinet, french horn, and tuba

answer: a. same unit

explanation:

what is the actual question though?

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