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
bekas [8.4K]
3 years ago
5

a car starts from rest and increases its speed to 15 m/s in 20 seconds. what is the cars acceleration

Physics
2 answers:
GalinKa [24]3 years ago
7 0

Answer:

In the picture above.

Explanation:

Good luck.

Bess [88]3 years ago
5 0

The acceleration of the car is 0.75m/s²

<u>Explanation:</u>

Given:

Speed, s = 15m/s

Time, t = 20 seconds

Acceleration, a = ?

We know,

Acceleration = \frac{speed}{time}

On substituting the value, we get:

a = \frac{15}{20} \\\\a = 0.75 m/s^2

Thus, the acceleration of the car is 0.75m/s²

You might be interested in
What is the rate of heat transfer by radiation, with an unclothed person standing in a dark room whose ambient temperature is 22
SIZIF [17.4K]

Answer:

5.45\times 10^{-4} W

Explanation:

T_{r} = Temperature of the room = 22.0 °C = 22 + 273 = 295 K

T_{s} = Temperature of the skin = 33.0 °C = 33 + 273 = 306 K

A = Surface area = 1.50 m²

\epsilon = emissivity = 0.97

\sigma = Stefan's constant = 5.67 x 10⁻⁸ Wm⁻² K⁻⁴

Rate of heat transfer is given as

R = \epsilon \sigma A (T_{s}^{2} - T_{r}^{2})

R = (0.97)(5.67\times 10^{-8}) (1.50) ((306)^{2} - (295)^{2})

R = 5.45\times 10^{-4} W

3 0
3 years ago
A football player kicks a 0.94 kg football with a force of 2.4 N. Calculate the acceleration of the football as the player kicks
Anon25 [30]
Hello, I hope this helps :)
So the equation to figure these kinds of questions is F=MA
F refers to force, which in this situation F would be 2.4
M refers to mass, mass would be 0.94
A refers to acceleration, which we are trying to figure out
So if we put in the information we know into the equation, it is now 2.4=0.94*A
So with that equation we can figure that 2.4 divided by 0.94 equals A
So 2.4/0.94= 2.553191489362 :'D
Don't worry, the rounded and correct answer is 2.6
Have a nice day =)
7 0
3 years ago
Read 2 more answers
What energy output objects work with the turbine
Angelina_Jolie [31]

Answer:

maybe alternator..generator..

4 0
3 years ago
Newton's first law of motion states that an object will keep a constant speed and direction unless acted upon by an unbalanced f
trasher [3.6K]

Answer:

The unbalanced force that caused the ball to stop was friction

Explanation:

As Newton's second law states, the acceleration of an object is proportional to the net force applied on the object:

F=ma

therefore, in order to move at constant speed, an object should have a net force of zero (balanced forces) acting on it.

In this case, the ball slows down and eventually comes to a stop: it means that the ball is decelerating, so there are unbalanced forces (net force different from zero) acting on it. The unbalanced force acting on the ball is the friction: friction is a force against the motion of the object, which is due to the contact between the surface of the ball and the surface of the street, and this force is responsible for slowing down the ball.

3 0
3 years ago
Read 2 more answers
Amy uses 20N of force to push a lawn mower 10 meters. How much work does she do? *
babunello [35]

She does 200J .

We know she uses 20N of force and 10m is the distance. We multiply both numbers and we are given our answer of 200J. Hope this was helpful. :)

4 0
3 years ago
Other questions:
  • La masa de un objeto en la tierra es de 100 kg.
    13·1 answer
  • In addition to hot surface temperatures, which characteristic makes mercy different from earth
    6·1 answer
  • For a medium to transmit a wave, the medium must _____.
    8·1 answer
  • A jet fighter pilot wishes to accelerate from rest at 5 ggg to reach Mach-3 (three times the speed of sound) as quickly as possi
    9·1 answer
  • Octane (C8H18) is burned with dry air. The volumetric analysis of the products on a dry basis is as below. (Fig. 15–12) Determin
    13·1 answer
  • If 1.0 joule of work is required to move a charge of 1.0 coulomb between two points is an electric field the potential differenc
    13·1 answer
  • 1. A book is at rest on a tabletop. Diagram the forces acting on the book. ​
    6·1 answer
  • Vary the sled’s height and mass. Observe the effect of each change on the potential energy of the sled.
    6·1 answer
  • ) Determining the order of events and the relative age of rocks by examining the position of
    9·1 answer
  • Examine table b then read the statement and choose the best responses. as the resistance increased under 25 v, the current . com
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!