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
REY [17]
3 years ago
14

Which best explains why we are able to accelerate forward when starting to run? A) The runner's upper body quickly leans forward

, causing the entire body to begin accelerating forward. B) As one leg moves backward, it provides an opposite force for the other foot to move forward. C) The foot not touching the ground propels the entire body as it swings forward. D) The striking foot pushes backward against the ground. The friction with the ground provides an equal and opposite force forward.
Physics
2 answers:
Neko [114]3 years ago
7 0

Answer:

D.The striking foot pushes backward against the ground. The friction with the ground provides an equal and opposite force forward

kolezko [41]3 years ago
5 0

Answer:

d

Explanation:

You might be interested in
The first step in the sewage-treatment process is _____.
Mandarinka [93]
The answer is A hope it helps

3 0
3 years ago
Read 2 more answers
A wire of resistance 7 ohms and length 2.8 m is bent into a circle and is concentric with a solenoid in which the magnetic flux
Serggg [28]

Answer:

The emf, electric field and the current in the wire are 10 V, 3.57 V/m and 1.43 A.

Explanation:

Given that,

Resistance = 7 ohms

Length = 2.8 m

Time t =0.2

We need to calculate the change in magnetic flux

Using formula of induced emf

\epsilon=\dfrac{d\phi}{dt}

Put the value into the formula

\epsilon=\dfrac{6-4}{0.2}

\epsilon=10\ V

We need to calculate the electric field in the wire

Using formula of electric field

E=\dfrac{V}{l}

E=\dfrac{10}{2.8}

E=3.57\ V/m

We need to calculate the current in the wire,

Using formula of ohm's law

V=IR

I=\dfrac{V}{R}

Put the value into the formula

I=\dfrac{10}{7}

I=1.43\ A

Hence, The emf, electric field and the current in the wire are 10 V, 3.57 V/m and 1.43 A.

7 0
3 years ago
Easy Guided Online Tutorial A special electronic sensor is embedded in the seat of a car that takes riders around a circular loo
kumpel [21]

Answer:

v = 17.30 m / s

Explanation:

For this exercise we will use Newton's second law

at the bottom of the loop and stopped

           ∑ F = 0

           N-W = 0

           N = W

            W = 770 N

the mass of the body is

            W = mg

             m = W / g

            m = 770 / 9.8

            m = 78.6 kg

on top of the loop and moving

           ∑ F = m a

           N + W = m a

note that the three vectors go in the same vertical direction down

           

the centripetal acceleration is

           a = v² / r

we substitute

           N + W = m v² / r

           v = \sqrt{(N+W) \frac{r}{m} }

let's calculate

          v = \sqrt{ (350+770) \frac{21}{78.6} }

          v = 17.30 m / s

7 0
3 years ago
A gravitational blank exist between you and every object in the universe
Phoenix [80]
I think it might be pull
6 0
3 years ago
Read 2 more answers
How many electrons can a nucleas hold
Hoochie [10]
A nuclear can hold 2 electrons
5 0
3 years ago
Other questions:
  • Describe how the potential energy of a river is changed into kinetic energy.
    10·1 answer
  • The uncertainty in position of a proton confined to the nucleus of an atom is roughly the diameter of the nucleus. If this diame
    5·1 answer
  • What rule should be used to transform a table of data to represent the
    13·1 answer
  • An object moves with velocity v(t)=t^2-8t+7
    9·1 answer
  • 1.) Properties of a compound are_____the properties of the elements that make them up.
    15·1 answer
  • The helicopter in the drawing is moving horizontally to the right at a constant velocity. The weight of the helicopter is W=5240
    8·1 answer
  • When a perfume bottle is opened, some liquid changes to gas and the fragrances spreads around the room.
    8·1 answer
  • Velocity has both speed and direction , so it is a
    14·1 answer
  • Which of the followings did newton help create ?
    15·2 answers
  • 3. Which forces would exist in a free body diagram of this car accelerating along the highway?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!