A skydiver of mass mmm jumps from a hot air balloon and falls a distance ddd before reaching a terminal velocity of magnitude vvv. Assume that the magnitude of the acceleration due to gravity is g.

Required:
Find the power Pd supplied by the drag force after the skydiver has reached terminal velocity v. (in same terms)

Answers

Answer 1

Answer:

Explanation:

When the object falling attains terminal velocity , net force on it becomes zero. That means drag force becomes equal and opposite to its weight.

So drag force = mg

where m is mass of falling body and g is acceleration due to gravity .

The drag force is constant . It is doing work against the weight of falling body . Object is falling v m /s . That means drag force is doing work per second as follows

Work done per second = force x displacement per second

= mg x v

Power of drag force = mgv.

Pd = mgv.

Related Questions

BRAINLEST FOR CORRECT ANSWER
Which has more momentum: a 3 kg sledgehammer swung at 1.5 m/s OR a 4 kg sledgehammer swung at 0.9 m/s? SHOW YOUR WORK FOR BRAINLEST

Answers

Answer:

3kg sledgehammer swung at 1.5 m/s

Explanation:

Small Sledgehammer:

Mass:3.0

Velocity:1.5

MASS×VELOCITY=MOMENTUM

3.0×1.5= 4.5 (momentum)

Large Sledgehammer:

Mass:4.0

Velocity:0.9

4.0×0.9=3.6 (momentum)

higher momentum is the smaller Sledgehammer.

Disadvanlayes and advantager of the and A and B

Answers

Answer:

Advantages

If there is a fault in one of the electric appliances, the current is able to pass through different paths of the circuit.

Disadvantages

In parallel circuits, we cannot increase the voltage since the resistance decreases in the parallel circuit.

Explanation:

The equation for centripetal force can be derived by substituting the equation for centripetal acceleration into Newton’s second law.

Please select the best answer from the choices provided

T
F

Answers

Answer:

True.

Explanation:

Newton's Second Law of Motion states that the acceleration of a physical object is directly proportional to the net force acting on the physical object and inversely proportional to its mass.

Mathematically, it is given by the formula;

Force = mass * acceleration

[tex] F = ma[/tex]

Centripetal acceleration is given by the formula;

[tex] Acceleration, a = \frac {v^{2}}{r}[/tex]

Where;

v is the velocity.

r is the radius.

The equation for centripetal force can be derived by substituting the equation for centripetal acceleration into Newton’s second law.

Let centripetal force be Fc

Fc = ma

Substituting the value of "a" into the above formula;

[tex] Fc = m \frac {v^{2}}{r} [/tex]

[tex] Fc = \frac {mv^{2}}{r} [/tex]

1. A Zambeef delivery track travels 18 km north, 10 km east, and 16 km south. What is its final displacement from the origin?

Answers

Answer:

10.2 km

Explanation:

Displacement is the shortest distance from your original position after movement.

Now, the Zambeef delivery truck moves 18 km north and then 10 km east and then 16 km south.

This means that vertically the truck is 2km short of the 18 km he travelled north..

So we can find the displacement using pythagoras theorem..

Let d be the distance from the current position to the initial position.

Thus;

d² = 2² + 10²

d² = 4 + 100

d = √104

d ≈ 10.2 km

I have attached a diagram showing the direction of this displacement

What are the key features of stem cell therapy?

Answers

Answer:

The two defining characteristics of a stem cell are perpetual self-renewal and the ability to differentiate into a specialized adult cell type.

Answer:

Stem cells have the ability to differentiate into specific cell types. The two defining characteristics of a stem cell are perpetual self-renewal and the ability to differentiate into a specialized adult cell type.

What happens when weathering and erosion work together?

A. New mountains are created
B. The climate changes overnight
C. Metal objects become rusty
D. They change the earths surface

Plssss help

Answers

Answer:

A. New mountains are created

Why do other stars look much dimmer than the sun?

Answers

A star's brightness also depends on its proximity to us. The more distant an object is, the dimmer it appears. Therefore, if two stars have the same level of brightness, but one is farther away, the closer star will appear brighter than the more distant star - even though they are equally bright!

Gravitational potential energy is
O the energy that an object has when it is at a
certain elevation, h
the energy of an object at rest
O the energy that an object has because it is in
motion
The cnone of the above

Answers

The
Answer
Is
None
Of
The
Above

17. How long does it take a giraffe running at a speed of 33 m/s to run 200 meters !

Answers

Answer:

6600sec

Explanation:

T=sv

T=200m*33m/s

T=6600sec

A pendulum is swimging. It swings 85 complete swings and this takes 102 seconds. What is the frequency?

Answers

Answer:

0.833 Hz

Explanation:

While, there are plenty of ways to calculate frequency, the one formula you should use in this case is:

#times/seconds --> 85/102

= 0.833 Hz

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