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
BARSIC [14]
3 years ago
6

. A child pulls a sled up a snow-covered hill. In the process, the child does 405 J of work on the sled. If she walks a distance

of 15 m up the hill, how large a force does she exert on the sled?
Physics
1 answer:
leonid [27]3 years ago
5 0
<span>Work done by child W = 405 J; Distance walked s = 15 m
 Calculating the force exerted on the sled,
 Work = Force x distance
 => Force F = Work W / distance s => => F = 405 / 15 = 27 N
 Force F is 27 Newtons.</span>
You might be interested in
The charge per unit length on a long, straight filament is -92.0 μC/m. Find the electric field 10.0 cm above the filament.
Pepsi [2]

Answer:

E = 1.655 x 10⁷ N/C towards the filament

Explanation:

Electric field due to a line charge is given by the expression

E = [tex]\frac{\lambda}{2\pi\times\epsilon_0\times r}[/tex]

where λ is linear charge density of line charge , r is distance of given point from line charge and ε₀ is a constant called permittivity and whose value is

8.85 x 10⁻¹².

Putting the given values in the equation given above

E = \frac{92\times10^{-6}}{2\times3.14\times8.85\times10^{-12}\times10^{-1}}

E = 1.655 x 10⁷ N/C

4 0
3 years ago
If an object has a mass of 1417g and it is moved 47 meters in 90 seconds, how much power was used?
astraxan [27]

Mass of the object is given as

m = 1417 g = 1.417 kg

now the speed of object is given as

v = \frac{d}{t}

here we know that

d = 47 m

t = 90 s

now we will have

v = \frac{47}{90} = 0.52 m/s

now we will have kinetic energy of the object as

KE = \frac{1}{2}mv^2

KE = \frac{1}{2}(1.417)(0.52)^2

KE = 0.19 J

now the power is defined as rate of energy

so here we can find power as

P = \frac{KE}{t}

P = \frac{0.19}{90} = 2.14\times 10^{-3} W

so above is the power used for the object

3 0
3 years ago
How do you think overpumping groudwater is related to the formation of sinkholes?
vladimir2022 [97]
Ground water keept the ground at a stable level when it is gone the cavern it was in has no support and is at risk of callaps
3 0
3 years ago
4. What is the acceleration of the car in each section?<br> b<br> с<br> d<br> a
makvit [3.9K]

Answer:

0-4 acceleration comes at 12 m/s where (B) stagnates at 12 m/s and remains for 4 seconds (C) is breaks being activated slowing the car to 6 m/s in 2 seconds and (D) over the course of 4 seconds brings the car to 10 m/s.

Explanation:

3 0
2 years ago
Read 2 more answers
a coil of 40 henry inductance is connected in series with aresistance of 8ohm and the combination is joined to the terminals of
Andreyy89

Answer: 5 seconds

Explanation:

Given the following :

Inductance (L) = 40 henry

Resistance = 8 ohms

The circuit given above is a Resistor - Inductor (RL) circuit network. The time constant of an RL circuit is the ratio of the circuit Inductance (L) and Resistance (R). Time constant is measured in seconds.

THAT IS;

Time constant = L / R

THEREFORE ;

Time constant = 40 / 8

Time constant = 5 seconds

7 0
3 years ago
Other questions:
  • Which object absorbs the most visible light?
    10·2 answers
  • How is our planets giant,thermohaline system of warm and cold water like a massive convection current
    5·1 answer
  • A uniform 190 g rod with length 43 cm rotates in a horizontal plane about a fixed, vertical, frictionless pin through its center
    10·1 answer
  • An object of mass 2.5 kg has a momentum &lt; 3, 6, 7 &gt; kg m/s. At this instant the object is acted on a by a force &lt; 50, 5
    12·1 answer
  • if a metal object was cut on half how much heat will be required to raise both half to a specific temperature
    8·1 answer
  • A plane flies from base camp to lake a, 200 km away in the direction 20.0° north of east. after dropping off supplies it flies t
    12·1 answer
  • A marble is dropped off the top of a building. Find it's velocity and how far below to its dropping point for the first 10 secon
    14·1 answer
  • Describe the movement of sperm in the female reproductive system. State the different structures that it must pass in order to m
    6·1 answer
  • What theory did Dalton propose to explain why the elements
    9·1 answer
  • 14 What is the weight of each of
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!