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
musickatia [10]
3 years ago
14

The driver of a car traveling at 30.5 m/s slams on the brakes so that the car undergoes a constant acceleration, skidding to a c

omplete stop in 4.5 s. What is his average acceleration?
-2.6 m/s^2
2.6 m/s^2
6.8 m/s^2
-6.8 m/s^2
Physics
1 answer:
dolphi86 [110]3 years ago
4 0

Answer:

-6.8 m/s²

Explanation:

Given:

v₀ = 30.5 m/s

v = 0 m/s

t = 4.5 s

Find: a

a = (v − v₀) / t

a = (0 m/s − 30.5 m/s) / 4.5 s

a = -6.8 m/s²

You might be interested in
Consider a simple ideal Rankine cycle with fixed turbine inlet conditions. What is the effect of lowering the condenser pressure
mr Goodwill [35]

Answer:

The effect of lowering the condenser pressure on different parameters is explained below.

Explanation:

The simple ideal Rankine cycle is shown in figure.

Effect of lowering the condenser pressure on

(a). Pump work input :- By lowering the condenser pressure the pump work increased.

(b) Turbine work output :- By lowering the condenser pressure the turbine work increased.

(c). Heat supplied :- Heat supplied increases.

(d). Heat rejected :- The heat rejected may increased  or decreased.

(e). Efficiency :- Cycle  efficiency is increased.

(f). Moisture content at turbine exit :- Moisture content increases.

8 0
2 years ago
Which tool is a wheel and axle?
Anton [14]
A steering wheel, a wrench, a screwdriver, and the back wheel of a bike are all examples of tools with a wheel and axle.
5 0
3 years ago
Read 2 more answers
When the distance between two stars decreases by one-third, the force between them
pashok25 [27]

Answer:

the force will increase by a factor 2.25

Explanation:

The gravitational force between the two stars is given by:

F=G\frac{m_1 m_2}{r^2}

where

G is the gravitational constant

m1, m2 are the masses of the two stars

r is the distance between the stars

If the distance is decreased by one-third, it means that the new distance is 2/3 of the previous distance

r'=\frac{2}{3}r

So the new force will be

F'=G\frac{m_1 m_2}{(\frac{2}{3}r)^2}=\frac{9}{4} G\frac{m_1 m_2}{r^2}=2.25 F

So, the force will be 2.25 times the previous value.

4 0
3 years ago
After the collision, car 1 has a final velocity of 6m/s south. What is the final velocity of car2?
dedylja [7]
I’m almost 100 percent sure it’s the first one
4 0
3 years ago
Use the "Law of Reflection" to describe why you cannot see your reflection in a piece<br> of paper.
Anni [7]

Answer:

it does not mirror the image

5 0
3 years ago
Other questions:
  • As temperature increase what energy increases
    14·1 answer
  • A car has uniformly accelerated from rest to a speed of 25m/s after traveling 75m. What is its acceleration in m/s^2
    10·1 answer
  • As you walk away from a plane mirror on a wall yiur image is always a real image no matter how far you are from the mirror?
    9·2 answers
  • Question 1 of 10
    7·1 answer
  • The materials that are changed in a chemical reaction are called A. reactants B. coefficients C. products D. none of the above
    7·2 answers
  • water flows in a pipe of a terminal of A1=0.02 m2 with a speed of V1=2 m/s. At the second end of the pipe A2=0.04 m2, the speed
    13·1 answer
  • I need help ASAP
    12·1 answer
  • When you ask you friend for hoemwork answers and he answers like a year later hahahah
    5·2 answers
  • What is the potential energy of a 20-kg safe sitting on a shelf 0.5 meters
    10·1 answer
  • Explain how each of the following factors affects resistance through a wire:
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!