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
otez555 [7]
3 years ago
15

On a snowy day, max (mass = 15 kg) pulls his little sister maya in a sled (combined mass = 20 kg) through the slippery snow. max

pulls on the sled with 12 n of force, directed at an angle of 15° above the ground. when he comes to a recently plowed section of road, he continues to pull the sled with the same force across the road while the road exerts a frictional force of 4 n on sled. what is the net work done on the sled while max pulls it 5 m across the road?

Physics
1 answer:
sesenic [268]3 years ago
7 0

Work done by a given force is given by

W = F.d

here on sled two forces will do work

1. Applied force by Max

2. Frictional force due to ground

Now by force diagram of sled we can see the angle of force and displacement

work done by Max = W_1 = Fdcos\theta

W_1 = 12*5cos15

W_1 = 57.96 J

Now similarly work done by frictional force

W_2 = Fdcos\theta

W_2 = 4*5cos180

W_2= -20 J

Now total work done on sled

W_{net}= W_1 + W2

W_{net} = 57.96 - 20 = 37.96 J

You might be interested in
Which device provides electrical energy to run an electric circuit
REY [17]

The correct answer is

C. The battery

The battery is a device that provides a potential difference in the circuit, and so an electromotive force (e.m.f.) which pushes the electrons in the circuit from the negative pole towards the positive pole of the battery, so they move through the circuit. Therefore, it provides electrical energy.

8 0
3 years ago
Read 2 more answers
The Doppler shift can be observed when ____________. Check all that apply. Group of answer choices the source of sound moves tow
castortr0y [4]

Answer:

the source of sound moves towards an observe

Explanation:

The Doppler effect is related to waves such as sound or light. the effect causes an increase or decrease in the frequency of sound light or other waves when the souces either move towards or away from the observer. For example the siren of the train to a person on the platform, the redshift seen by astronomers.

Therefore, The Doppler shift can be observed when the source of sound moves towards an observer From a place closer to the observer than the last wave's crest, each consecutive wave crest is sent. Each wave therefore, takes a little less time than the preceding wave to reach the observer.

6 0
3 years ago
One property that makes electromagnetic waves differ from other types of waves is that they can
Flauer [41]
travel through a vacuum at the speed of light. Other waves need a medium; sound waves need molecules that vibrate.
5 0
3 years ago
A fine-grained sedimentary rock is known as _____.
Yakvenalex [24]
The finer‐grained<span> s</span>edimentary rocks<span> are called shale, siltstone, and mudstone</span>
5 0
3 years ago
Here are some energy resources. List the renewable energy resources.
Artemon [7]
Solar wind geothermal
3 0
3 years ago
Read 2 more answers
Other questions:
  • Which statement describes the relationship between gravitational force and strong nuclear force? (2 points) Select one: a. Stron
    12·2 answers
  • The total mechanical energy of a system is equally divided between kinetic energy and potential energy. can never be negative. i
    10·1 answer
  • An electromagnetic wave is propagating towards the west. At a certain moment the direction of the magnetic field vector associat
    8·1 answer
  • People living at Earth’s equator are traveling at a constant speed of about 1,670 km/h as Earth spins on its axis. What are thes
    10·1 answer
  • A 100-W (watt) light bulb has resistance R=143Ω (ohms) when attached to household current, where voltage varies as V=V0sin(2πft)
    7·1 answer
  • Why does water frozen in the cracks of a rock help to break down the rock? a) Water expands when frozen and chemically forces th
    9·1 answer
  • How many moles are in 73.4 grams of Phosphorus?
    11·1 answer
  • What is one way to store a lot of potential energy in the field between two charged objects?
    5·1 answer
  • Does the size of the magnetic field change with the size of the magnet?
    10·1 answer
  • I'LL MARK U BRAINLIST!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!