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
faust18 [17]
4 years ago
10

A car accelerates from rest at 5 m/sec2 for 12 seconds what is the final velocity

Physics
1 answer:
VladimirAG [237]4 years ago
7 0

 Vi =0  ( as car starts from rest )

Acceleration= a = 5m/s²

t =12sec

Vf =Vi + at

Vf= 0 + (5m/s²) (12s)

Vf=60 m/s

You might be interested in
Please help me pwease
Alisiya [41]

Answer:

Iron

Explanation:  It is by mass the most common element on Earth, right in front of oxygen, forming much of Earth's outer and inner core.

6 0
3 years ago
Ezra (m = 20.0 kg) has a tire swing and wants to swing as high as possible. He thinks that his best option is to run as fast as
Dmitriy789 [7]

Answer:

a) v=5.6725\,m.s^{-1}

b) h= 1.6420\,m

Explanation:

Given:

  • mass of the body, M=20\,kg
  • mass of the tyre,m=10\,kg
  • length of hanging of tyre, l=3.5m
  • distance run by the body, d=10m
  • acceleration of the body, a=3.62m.s^{-2}

(a)

Using the equation of motion :

v^2=u^2+2a.d..............................(1)

where:

v=final velocity of the body

u=initial velocity of the body

here, since the body starts from rest state:

u=0m.s^{-1}

putting the values in eq. (1)

v^2=0^2+2\times 3.62 \times 10

v=8.5088\,m.s^{-1}

Now, the momentum of the body just before the jump onto the tyre will be:

p=M.v

p=20\times 8.5088

p=170.1764\,kg.m.s^{-1}

Now using the conservation on momentum, the momentum just before climbing on the tyre will be equal to the momentum just after climbing on it.

(M+m)\times v'=p

(20+10)\times v'=170.1764

v'=5.6725\,m.s^{-1}

(b)

Now, from the case of a swinging pendulum we know that the kinetic energy which is maximum at the vertical position of the pendulum gets completely converted into the potential energy at the maximum height.

So,

\frac{1}{2} (M+m).v'^2=(M+m).g.h

\frac{1}{2} (20+10)\times 5.6725^2=(20+10)\times 9.8\times h

h\approx 1.6420\,m

above the normal hanging position.

3 0
3 years ago
What factor account for the change of viscosity in fluid
netineya [11]

Answer:

A fluid's viscosity strongly depends on its temperature. Along with the shear rate, temperature really is the dominating influence

Explanation:

The higher the temperature is, the lower a substance's viscosity is. Consequently, decreasing temperature causes an increase in viscosity.  

5 0
4 years ago
With what scientific discovery is sir isaac newton most commonly associated? the theory of gravity boyle's law heliocentrism
konstantin123 [22]
<span>the theory of gravity</span>
5 0
3 years ago
Read 2 more answers
The effect produced when two or more sound waves pass through the same point simultaneously is called?
navik [9.2K]
The answer to the question is sound
7 0
3 years ago
Other questions:
  • How do magnets act when they are near eachother ?
    15·1 answer
  • Can looking at a star tell us how old it is?
    5·2 answers
  • The change of an atom from the excited state to the ground state always requires _______
    14·1 answer
  • A meter stick whose mass is 330 grams lies on ice. You pull at one end of the meter stick, at right angles to the stick, with a
    14·1 answer
  • When 0.1375 g of solid magnesium is burned in a constant-volume bomb calorimeter, the temperature increases by 1.126°C. The heat
    7·1 answer
  • Describe the laws of liquid pressure and explain the term fluid. (Please try to give the correct answer 'coz it's urgent!)​
    10·1 answer
  • A car is traveling down the highway at speed 5 m/s when the driver slams on the brakes and skids to a stop in a distance 80 m. A
    13·1 answer
  • 1.
    12·2 answers
  • Which statement accurately describes nutritional dietary supplements?
    14·1 answer
  • Determine an expression for the coefficient of static friction in terms of m2 and m1.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!