Physics, 02.07.2019 16:30 kktiger14

Compare the force of air resistance and the force of gravity on an object falling at its terminal velocity

Answers: 1

Show answers

Answers

Answer from: StupidFatChipmunk

on an object falling we have three forces acting mainly

force of gravity : acts in downward direction

force of buoyancy : acts in upward direction

drag force due to air : acts in upward direction

the force of gravity makes the object fall in downward direction and force of buoyancy acts in opposite upward direction to oppose the motion. initially since force of gravity was greater than the force of buoyancy , the net force is acting in down direction and hence the object gains speed in downward direction.

on the object falling down , drag force by air acts in upward direction to oppose is downward motion. the drag force is directly propotional to the square of the speed. hence as the object gains speed in down direction , the drag force increase in upward direction.

at some velocity called terminal velocity , the sum of drag force and force of buoyancy becomes equal to the force of gravity and then there is no net force on the object . so the object then moves at constant terminal velocity.

at terminal velocity ,

force of gravity = force of air resistance + force of buoyancy

Answer from: Quest

Alinear relationship would look like a straight line on the graph. it could have a positive negative or 0 slope. so it could be a line potentially going in any direction but it must be perfectly straight.

Answer from: Quest

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

Another question on Physics

Physics, 22.06.2019 10:00

Which fact supports the conclusion that there will be fewer farm managers in the future? a) a farmer manager’s duties vary by the type of farm. b) farm technology is replacing some administrative jobs c) farm managers often need experience but not education. d) administrative duties include budgeting and training staff.

Answers: 2

Answer

Physics, 22.06.2019 23:50

An alpha particle with kinetic energy 12.5 mev makes a collision with lead nucleus, but it is not "aimed" at the center of the lead nucleus, and has an initial nonzero angular momentum (with respect to the stationary lead nucleus) of magnitude l = p0 b, where p0 is the magnitude of the initial momentum of the alpha particle and b=1.40×10−12 m. (assume that the lead nucleus remains stationary and that it may be treated as a point charge. the atomic number of lead is 82. the alpha particle is a helium nucleus, with atomic number 2.) what is the distance of closest approach?

Answers: 2

Answer

Physics, 23.06.2019 03:50

Which stable element is used to determine the age of volcanic rock? a- argon b- carbon-14 c- potassium d- carbon-12

Answers: 2

Answer

Physics, 23.06.2019 05:00

Two cans on a sunny window one black and the other white construct and explanation of the effect of sun will have on both cans over a two hour period?

Answers: 1

Answer

You know the right answer?

Compare the force of air resistance and the force of gravity on an object falling at its terminal ve...

Questions