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
Marina CMI [18]
4 years ago
13

A particle moves along the x axis. Its position is given by the equation

Physics
1 answer:
krok68 [10]4 years ago
3 0

The position of the particle when it changes direction is x = 3.0 m

Explanation:

The position of the particle is given by the equation

x(t)=2.4+2.9t-3.5t^2

In order to determine its position when it changes direction, we need to  find the time t at which the velocity of the particle becomes zero.

The velocity of the particle si given by the derivative of the position, therefore:

v(t)=\frac{dx}{dt}=2.9-2\cdot 3.5t^{2-1}=2.9-7t

The velocity is zero when:

v(t)=0=2.9-7t\\7t=2.9\\t=\frac{2.9}{7}=0.41 s

And therefore, the position at t = 0.41 s is

x(0.41)=2.4+2.9(0.41)-3.5(0.41)^2=3.0 m

Learn more about position and velocity:

brainly.com/question/5248528

#LearnwithBrainly

You might be interested in
Please help me and show work, will mark Brainliest!!
Licemer1 [7]

Speed is distance over time, learn that formula and look at the image

3 0
3 years ago
"how do the fundamental laws of physics make manifest that space has 3 dimensions?"
bazaltina [42]
If you are asking for a proof on having at least 3 dimensions in space, you can find the physical proof anywhere in your daily life activities. Just the fact that solids have volumes is a proof already that we live in a three-dimensional space. We can move forwards, backwards, sidewards and in all other directions possible.

When you go right into detail, the fundamental laws governing these proofs are very technical. They have differential equations to show as proof. It is too detailed to discuss here. The important things is that, these fundamental laws are what explains the science in our basic activities and natural phenomena:

*Gravitation and planetary motion
* Translation, rotation, magnetic field, forces
* Integrals of equations: 
8 0
3 years ago
PLEASE HELP!!! <br><br> i’ll mark brainliest if you’re correct
dedylja [7]

\qquad \qquad\huge \underline{\boxed{\sf Answer}}

The net force acting on the block is ~

\qquad \sf  \dashrightarrow \: 10 + 5

\qquad \sf  \dashrightarrow \: 15 \:N

So, the Answer in the boxes will be ~

\boxed{ \sf15} \:  \boxed{ \sf N}

7 0
3 years ago
Which of the following could possibly be predicted? Earthquakes Landslides Foreshocks Volcanic eruptions
NeTakaya

Answer:

Volcanic Eruptions

Explanation:

The volcano can start showing signs that it may be about to explode.

6 0
4 years ago
A girl exerts a horizontal force of 109 N on a crate with a mass of 31.2 kg. HINT (a) If the crate doesn't move, what's the magn
vesna_86 [32]

Answer:

(a) Magnitude of static friction force is 109 N

(b) Minimum possible value of static friction is 0.356

Solution:

As per the question;

Horizontal force exerted  by the girl, F = 109 N

Mass of the crate, m = 31.2 kg

Now,

(a) To calculate the magnitude of static friction force:

Since, the crate is at rest, the forces on the crate are balanced and thus the horizontal force is equal to the frictional force, f:

F = f = 109 N

(b) The maximum possible force of friction between the floor and the crate is given by:

f_{m} = \mu_{s}N

where

N = Normal reaction = mg

Thus

f_{m} = \mu_{s}mg

For the crate to remain at rest, The force exerted on the crate must be less than or equal to the maximum force of friction.

f\leq f_{m}

f \leq \mu_{s}mg

109 \leq \mu_{s}\times 31.2\times 9.8

\mu_{s}\geq 0.356

7 0
3 years ago
Other questions:
  • Eq-45 what type of boat requires navigation lights?
    11·1 answer
  • A sound wave from a siren has an intensity of 111.2 W/m2 at a certain point, and a second sound wave from a nearby ambulance has
    10·1 answer
  • Why is the geologic record important to scientists
    14·1 answer
  • One problem with weight training as a way to improve overall health is that the results of a weight-training program are not mea
    7·2 answers
  • When you are moving up at a constant speed in an elevator, there are two forces acting on you: the floor pushing up on you (F1)
    13·1 answer
  • Which law best describes this statement earth moves faster in the winter when its closest to the sun
    7·1 answer
  • Explain how competition between organisms affects the availability of resources in an area.
    12·1 answer
  • 10) The coil of transformer is coated by enamel why​
    6·1 answer
  • Which of the following explanations is correct about the wave that travels through the medium?
    12·1 answer
  • A car is traveling at 21.0 m/s. It slows to a stop at a constant rate over 5.00s. How far does the car travel during those 5.00
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!