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
Likurg_2 [28]
2 years ago
6

3. What is the acceleration of a car at rest that stays at rest over 10 seconds?

Physics
1 answer:
Yuliya22 [10]2 years ago
8 0

Answer:

a.

Explanation:

Use accleration formula,

a =  \frac{v _{f} - v _{i}}{t}

The initial velocity and final velocity is at zero. and t=10

So we got

\frac{0}{10}  = 0

so

a = 0

a is the answer

You might be interested in
Samantha is refinishing her rusty wheelbarrow. She moves her sandpaper back and forth 45 times over a rusty area, each time movi
Leviafan [203]

Answer:

W = 12.96 J

Explanation:

The force acting in the direction of motion of the sand paper is the frictional force. So, we first calculate the frictional force:

F = μR

where,

F = Friction Force = ?

μ = 0.92

R = Normal Force = 2.6 N

Therefore,

F = (0.92)(2.6 N)

F = 2.4 N

Now, the displacement is given as:

d = (0.12 m)(45)

d = 5.4 m

So, the work done will be:

W = F d

W = (2.4 N)(5.4 m)

<u>W = 12.96 J</u>

5 0
3 years ago
Some people believe that the Moon’s phases are caused by Earth’s shadows on the Moon. Is this true?
emmasim [6.3K]
No thats false. If your trying to say is true that people BELIEVED that then yes its true people believed it but if your talking about that question then its false
5 0
3 years ago
A person having a mass of 85 kg sits on the edge of a horizontal rotating platform, 2.2 m from the center of the platform, and h
gulaghasi [49]
The angular momentum of the person is given by:
L=mvr
where m=85 Kg is the mass of the person, v=6.6 m/s is the tangential velocity, and r=2.2 m is the distance of the person from the center of rotation. Using these data, we find
L=(85 Kg)(6.6 m/s)(2.2 m)=1234.2 Kg \cdot m^2/s
3 0
3 years ago
A car of mass 200 kg, moving with a forward acceleration of 3 m/s-ıs acted upon by
Shkiper50 [21]

Answer:

600 N

Explanation:

5 0
2 years ago
An object is placed at a distance of 60 cm from a concave lens of focal length 30cm.find the position and nature of the image?
ladessa [460]

Answer:

using the lens formula: 1/f = 1/u + 1/v

focal length f = -30 (negative because it is concave lens)

object distance u = 60

image distance v= unknown

1/-30 = 1/60 + 1/v

v = -20

So, the image is 20cm from lens (on the same side along with the object), and it is virtual (because of negative sign) and erect (concave lens must produce erect images).

5 0
3 years ago
Other questions:
  • The theory that the Earth's crust and part of the upper mantle are broken into sections that move on a fluid layer of the mantle
    14·1 answer
  • The surface temperature of venus is so high because
    5·1 answer
  • A person in the back of a pick-up moving at 20 m/s relative to the Earth, throws a baseball with a speed of 15 m/s in a directio
    10·1 answer
  • The change in momentum of an object is equal to the Question 4 options: Force acting on it times its velocity. impulse acting on
    15·1 answer
  • Explain what happens when a ferromagnetic material is made into a permanent magnet.
    8·1 answer
  • Force is measured in units called
    9·2 answers
  • What is the final temperature of 0.5 kg of water initially at 18 °C after 65 kJ of
    8·2 answers
  • Please help me with this one
    6·1 answer
  • Lauren pushed a book off the edge of a table. Which energy change occurs as the book falls from the table?
    11·1 answer
  • How much mass would pizza dough have after you flatten it
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!