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
kati45 [8]
3 years ago
9

sledge (including load) weighs 5000 N. It is pulled on level snow by a dog team exerting ahorizontal force on it. The coefficient

of kinetic friction between sledge and snow is 0.05. Howmuch work is done by the dog team pulling the sledge 1000 m at constant speed?
Physics
1 answer:
lara31 [8.8K]3 years ago
6 0

Answer:

2.5 x 10^{5} J

Explanation:

weight = 5,000 N

coefficient of friction = 0.05

distance = 1000 m

how much work is done by the dogs pulling the sledge

work done = force x coefficient of friction x distance

work done = 5000 x 0.05 x 1000 = 2.5 x 10^{5} J

You might be interested in
The cars on an amusement-park ride travel at a constant velocity of 4.0 m/s on a circular track
lys-0071 [83]
V^2=u^2+2as
V=0
a =-u^2/2s
a=[4]^2/2[4]
a=-2m/s^2
7 0
3 years ago
Sam is recklessly driving 60 mph in a 30 mph speed zone when he suddenly sees the police. he steps on the brakes and slows to 30
barxatty [35]
For this problem, we use the derived equations for rectilinear motion at constant acceleration. The equations used for this problem are:

a = (v - v₀)/t
2ax = v² - v₀²
where
a is the acceleration
x is the distance
v is the final velocity
v₀ is the initial velocity
t is the time

The solution is as follows;

a = (60mph - 30 mph)/(3 s * 1 h/3600 s)
a = 36,000 mph²

2(36,000 mph²)(x) = 60² - 30²
Solving for x,
x = 0.0375 miles
5 0
3 years ago
Meg walks with a velocity of 0.9 m/s west. She does so while riding on a train that is traveling with a velocity of 2.7 m/s east
Shkiper50 [21]
<span>Velocities are vectors so we can add them!

Let's let +x be East and -x be West.

 -0.9 + 2.7 = 1.8
 
Since our answer is positive that means East so the answer is C.</span>
6 0
4 years ago
Interference is an example of which aspect of electromagnetic radiation
Phantasy [73]

Answer:

We experience interference while listening to the radio. A radio station works by sending and receiving radio waves. Since the radio waves are being interfered with other waves which must have a wave nature.

The interference is the net result of two individual waves. It can be constructive or destructive interference and is the property of waves and not particles.

This interference is an example of electromagnetic radiation. Thus we experience wave behavior of electromagnetic radiation in our daily communications.

7 0
3 years ago
Read 2 more answers
What happens to the iron in the coilgun if the electricity in the coil was turned on
Andrews [41]

  • <em><u>The piece of iron has become a magnet. Some substances can be magnetized by an electric current. When electricity runs through a coil of wire, it produces a magnetic field. The field around the coil will disappear, however, as soon as the electric current is turned off.</u></em>
7 0
3 years ago
Other questions:
  • Until a train is a safe distance from the station, it must travel at 5 m/s. Once the train is on open track, it can speed up
    13·1 answer
  • What does the slope of a position time graph determine?
    9·1 answer
  • What creates more pressure?
    5·1 answer
  • What are the cahnges that a force can bring out on a body ? <br><br><br>Give examples
    14·2 answers
  • All BUT one statement applies to electromagnetic radiation. That is
    9·1 answer
  • An object is moving east, and its velocity changes from 65 m/s to 25 m/s in 10 seconds. Which describes the acceleration? negati
    13·1 answer
  • Consider the air moving over the top of the light bulb. The streamlines near the bulb will be squeezed together as the air goes
    10·1 answer
  • A ball is thrown with an initial upward velocity of 5 m/s.
    11·1 answer
  • An alkane has molecular weight 86. Write its molecular formula. What will be its physical state?
    15·1 answer
  • A sled is being pulled to the left by 5 dogs each dog is pulling with
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!