1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Charra [1.4K]
3 years ago
6

Some gliders are launched from the ground by means of a winch, which rapidly reels in a towing cable attached to the glider. Wha

t average power must the winch supply in order to accelerate a 156-kg ultralight glider from rest to 24.9 m/s over a horizontal distance of 58.0 m? Assume that friction and air resistance are negligible, and that the tension in the winch cable is constant.
Physics
1 answer:
aliina [53]3 years ago
6 0

Answer:

P=627.47W

Explanation:

To solve this problem we have to take into account, that the work done by the winch is

W=Fh

the force, at least must equal the gravitational force

F=Mg=(156kg)(9.8\frac{m}{s^2})=1258.8N

with force the tension in the cable makes the winch go up.

The work done is

W=(1258.8N)(58.0m)=73010.4J

To calculate the power we need to know what is the time t. But first we have to compute the acceleration

The acceleration will be

v_f^2=v_0+2ah\\a=\frac{v_f^2}{2h}=\frac{(24.9\frac{m}{s})}{2(58.0m)}=0.214\frac{m}{s^2}

and the time t

v_f=v_0+at\\t=\frac{v_f}{a}=116.35s

The power will be

P=\frac{W}{t}=\frac{73010.4J}{116.35s}=627.47W

HOPE THIS HELPS!!

You might be interested in
According to the relationship between torque and angular acceleration, what happens when you have more torque (given a constant
gogolik [260]

Answer:

The angular acceleration increases.

Explanation:

The relationship between the torque and angular acceleration is :

\tau=I\times \alpha

Where

I is the moment of inertia

\alpha is the angular acceleration

We can see that the torque is directly proportional to the angular acceleration. So, when we have more torque it means angular acceleration increases. Hence, the correct option is (A).

7 0
3 years ago
1. Why is the theory that all things are made up of atoms a theory and not a fact?
steposvetlana [31]
Because there is no record of all things. As we have partially unknow information, it can never be held as a fact.
3 0
3 years ago
It takes 300 newtons of force and a distance of 20 meters for a moving car to come to stop
Andrei [34K]
The answer is 15 I think.
7 0
4 years ago
Prepare a summary to explain how much the final birds varied from the original birds after 1 million years of natural selection.
mezya [45]

Answer:

your father️️️ just 5 points

5 0
3 years ago
Jill is pushing a box across the floor. Which represents the upward force perpendicular to the floor?
Georgia [21]

Answer:

When Jill is pushing a box across a floor, it represents the upward motion and it is natural force is applied.

So it is represented as FN and normal force takes place in considering the force perpendicular to the floor.

It seems to support that forced applied on an object when the object is in contact with other.

Explanation:

5 0
3 years ago
Other questions:
  • Marta is standing 4 ft behind a fence 6 ft 6 in. tall. When she looks over the fence, she can just see the top edge of a buildin
    8·1 answer
  • A car is traveling in a race. The car went from the initial velocity of 35 m/s to the final velocity of 65 m/s in 5 seconds. Wha
    11·1 answer
  • What are three examples of a chemical change in matte
    15·1 answer
  • Water absorbs and releases large amount of energy before changing temperature, a characteristic known as
    10·1 answer
  • Which type of mass movement makes a pattern of wrinkles, or terraces, on hillsides ?
    7·2 answers
  • A 20-kg object sitting at rest is struck elastically in a head-on collision with a 10-kg object initially moving at 3.0 m/s. Fin
    13·1 answer
  • Electric field lines can never cross. Woodward crossed electric field lines indicate?
    9·1 answer
  • A proton traveling due west in a region that contains only a magnetic field experiences a vertically upward force (away from the
    13·1 answer
  • A 3000-kg truck moving with a velocity of 25 m/s hits a 1000-kg parked car. The impact causes the 1000-kg car to be set in motio
    12·1 answer
  • A mustang, has an average velocity of 33 m/s while covering a course that is 21 miles long. (1 mile = 1609 m). How long did it t
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!