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
Aleks [24]
3 years ago
13

A skier has an acceleration of 2.5 m/s2. How long does it take her to come to a complete stop from a speed of 18 m/s?

Physics
2 answers:
Andrej [43]3 years ago
8 0
A = 2.5 m/s²

since , we have to stop so v = 0 m/s ( final velocity)

u = 18 m/s

t = ?

using ,

⇒ v = u + at

⇒ 0 = 18 + 2.5t

by this we are getting t<0 , since , t cant be -ve , Check your question
aleksandr82 [10.1K]3 years ago
4 0
(Assuming acceleration is -2.5m/s2) 7.2 seconds.
You might be interested in
What is the specific heat for the aluminum wire?
Alisiya [41]
0.902

hope this helps :)
4 0
3 years ago
Current is the movement of positive charges called electrons.
spayn [35]

Answer:

False -> negative charge

7 0
2 years ago
Read 2 more answers
I'm walking 1.6m/s to 7-11 and it started to rain so I sped up to 2.7m/s in 1.2
olga nikolaevna [1]

Answer:

Explanation:

a = \frac{v_f-v_0}{t} which is the final velocity minus the initial velocity in the numerator, and the change in time in the denominator.  For us:

a=\frac{2.7-1.6}{1.2} so

a = .92 m/s/s (NOT negative because you're speeding up)

5 0
3 years ago
Which of these events is associated with September 11, 2001?
Oxana [17]
Terrorist attacks on the United States is the answer.

On September 11, 2001 that was the day New York got attacked by terrorists. The Twin Towers were the ones that got affected, 2,996 people (maybe more) died during that attacked. The terrorists were one of the 2,996 people that died (19 of them died). more than 6,000 were injured that day.
#NeverForget

Hope this helped
Have a great day<span />
7 0
3 years ago
A water wheel rotates with a period of 2.26 s. If the water wheel has a radius of l.94 m,
Dafna11 [192]

Answer:

The correct answer is B)

Explanation:

When a wheel rotates without sliding, the straight-line distance covered by the wheel's center-of-mass is exactly equal to the rotational distance covered by a point on the edge of the wheel.  So given that the distances and times are same, the translational speed of the center of the wheel amounts to or becomes the same as the rotational speed of a point on the edge of the wheel.

The formula for calculating the velocity of a point on the edge of the wheel is given as

V_{r} = 2π r / T

Where

π is Pi which mathematically is approximately 3.14159

T is period of time

Vr is Velocity of the point on the edge of the wheel

The answer is left in Meters/Seconds so we will work with our information as is given in the question.

Vr = (2 x 3.14159 x 1.94m)/2.26

Vr = 12.1893692/2.26

Vr = 5.39352619469

Which is approximately 5.39

Cheers!

7 0
2 years ago
Other questions:
  • Most calculators operate on 6.0 V. If, instead of using batteries, you obtain 6.0 V from a transformer plugged into 110-V house
    14·1 answer
  • If an air traffic controller is describing the speed of an airplane as well as the direction in which it should begin its dissen
    12·1 answer
  • 9. A wave on Beaver Dam Lake passes by two docks that are 40.0 m apart.
    15·1 answer
  • If the astronaut throws the tool with a force of 16.0 n , what is the magnitude of the acceleration a of the astronaut during th
    5·2 answers
  • Michaela is babysitting little Tommy Turner who is known to be terror . Michaela answered the phone when Tommy's parents called
    12·2 answers
  • Atoms of the same element having unequal numbers of protons and electrons are called __________
    9·1 answer
  • How is thermal energy transferred during conduction? Check all that apply.
    5·1 answer
  • How does increasing the speed of a motorbike change the amount of energy in its kinetic energy store?
    9·2 answers
  • Question 6 of 10
    9·1 answer
  • The velocity of a bus increases from 27km/h to 30m/s in . Calculate its acceleration.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!