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
Nutka1998 [239]
3 years ago
7

The time it takes a car to attain a speed of 30 m/s when accelerating from rest at 2 m/s2 is?

Physics
1 answer:
Blizzard [7]3 years ago
7 0

Explanation:

u = 0m/s

v = 30m/s

a = 2m/s²

Using Kinematics, we have v = u + at.

Therefore t = (v - u) / a

= (30 - 0) / (2) = 15 seconds. (B)

You might be interested in
Crude oil is a mixture of many different components. The extraction of crude oil from the Earth is important, but its refinement
Neporo4naja [7]

Answer: Different fuel components boil at different temperatures, allowing them to be separated.

Explanation:

3 0
3 years ago
for any object suspended by any number of ropes, wires, or chains, how is the total amount of tension (tension in each rope adde
Sveta_85 [38]

Answer:

To calculate the tension on a rope holding 1 object, multiply the mass and gravitational acceleration of the object. If the object is experiencing any other acceleration, multiply that acceleration by the mass and add it to your first total.

Explanation:

The tension in a given strand of string or rope is a result of the forces pulling on the rope from either end. As a reminder, force = mass × acceleration. Assuming the rope is stretched tightly, any change in acceleration or mass in objects the rope is supporting will cause a change in tension in the rope. Don't forget the constant acceleration due to gravity - even if a system is at rest, its components are subject to this force. We can think of a tension in a given rope as T = (m × g) + (m × a), where "g" is the acceleration due to gravity of any objects the rope is supporting and "a" is any other acceleration on any objects the rope is supporting.[2]

For the purposes of most physics problems, we assume ideal strings - in other words, that our rope, cable, etc. is thin, massless, and can't be stretched or broken.

As an example, let's consider a system where a weight hangs from a wooden beam via a single rope (see picture). Neither the weight nor the rope are moving - the entire system is at rest. Because of this, we know that, for the weight to be held in equilibrium, the tension force must equal the force of gravity on the weight. In other words, Tension (Ft) = Force of gravity (Fg) = m × g.

Assuming a 10 kg weight, then, the tension force is 10 kg × 9.8 m/s2 = 98 Newtons.

7 0
3 years ago
Blood ki kami se konsa rog hota hai?​
Darya [45]

Answer:

anaemia, low blood pressure etc.

5 0
3 years ago
Read 2 more answers
WILL MARK BRAINLIEST!!!!
zloy xaker [14]

Answer:

Wave model

Explanation:

7 0
3 years ago
Read 2 more answers
The rate at which a candle burns in millimeters per minute is:
anzhelika [568]
since both components, length and time, are measurable 
<span>since Rate = length ÷ time </span>
<span>∴ rate is also measurable and ∴ quantitative.

</span>
3 0
3 years ago
Other questions:
  • Calculate the mass defect of the helium nucleus 32he. the mass of neutral 32he is given by mhe=3.016029amu. express your answer
    14·1 answer
  • assuming that there are no outside forces, what will happen if two neutral atoms are placed 1 M apart in a vacuum. a)the atoms w
    13·1 answer
  • A very long cylinder, of radius a, carries a uniform polarization P perpendicular to its axis. Find the electric field inside th
    14·2 answers
  • Subduction occurs as a result of:__________
    7·1 answer
  • A uniform disk a uniform hoop and a uniform sphere are released at the same time at the top of an inclined ramp. They all roll w
    5·1 answer
  • Is a process that modifies light waves so they vibrate in a single plane
    5·1 answer
  • Can y’all please help
    11·1 answer
  • in as small room fan of rating 50 watt is used for 10hrs 2bulb of rating 10v are used for 8hrs daily.calculate monthly. electric
    9·1 answer
  • 1. What is the difference between the two divisions of the skeletal system?
    14·1 answer
  • The device that is made up of many single slits that diffract light and form a diffraction pattern , is called
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!