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
Deffense [45]
3 years ago
11

Please help ASAP. A 1550 kg car is initially at rest on level ground when the engine does 450 000 J of work on it. After the car

reaches its top speed, the engine cuts out and the car begins to roll up a hill. If the car continues to roll until its velocity is zero, what final height will it reach?
Physics
1 answer:
AlekseyPX3 years ago
5 0

Answer:

29.6 m

Explanation:

Work is change in KE, and at the bottom of the hill, the car only has KE. Therefore, the car's total mechanical energy (ME) at the bottom of the hill must be equal to its KE (450 000 J). At the top of the hill, the car is no longer moving, so its total energy must be all gravitational potential energy. Following convervation of ME:

ME_{i} = ME_{f}

KE_{i} = GPE_{f}

450 000 J = mgh_{f}

h_{f} = \frac{450 000 J}{m * g}

h_{f} = \frac{450 000 J}{1550 kg * 9.81 m/s^{2} }  = 29.6 m

You might be interested in
What is the 4th dimension? I have heard that it's time, it's a from of saying characteristic. I don't know I need help on this,
sashaice [31]

If you want to tell a friend about a fish you caught or a tree you cut down,
you're going to tell him WHERE you were ... its position in space, 3 numbers,
'x', 'y', and 'z' ... and also WHEN you were ... its position in time, one more
number. 

Dimensions are numbers used to describe the location of a point, and the
difference in location between two points.  With four numbers, you can exactly
describe the location of anything, and its distance from any other thing, in
space and time.


3 0
3 years ago
When 560,000 is written in scientific notation, the power of 10 is
attashe74 [19]
The answer would be 5.6x10^5
4 0
3 years ago
Read 2 more answers
1. While John is traveling along an interstate highway, he notices a 160-mile marker as he passes through town. Later John passe
pogonyaev

Number of miles that marker shows when passes through town= 160 miles.

Number of miles that marker shows currently to John = 115 miles.

We need to find the distance between town and John's current location.

For the problem, we can clearly see that Town is at 160 miles away but when John passes the marker shows 115 miles.

So, it's just the difference between 160 miles and 115 miles.

In order to find that difference, we need to subtract those two numbers.

160miles - 115miles = 45 miles.

So, we could say the distance between town and John's current location is 45 miles.

4 0
3 years ago
The OBD-II catalytic converter monitor uses _______ sensor(s) to monitor catalytic converter efficiency.
oksano4ka [1.4K]
C comment for an explanation
8 0
3 years ago
An optical disk drive in your computer can spin a disk up to 10,000 rpm (about 1045 rad/s 1045 rad/s ). If a particular disk is
Scilla [17]

Answer:

The magnitude of the average angular acceleration of the disk is 4139.74\ rad/s^2.

Explanation:

Given that,

Angular velocity, \omega_i=968.7\ rad/s

The disk comes to rest, \omega_i=0

Time, t = 0.234 s

We need to find the magnitude of the average angular acceleration of the disk. It is given by change in angular velocity per unit time. So,

\alpha =\dfrac{\omega f}{t}\\\\\alpha =\dfrac{968.7\ rad/s}{0.234\ s}\\\\\alpha =4139.74\ rad/s^2

So, the magnitude of the average angular acceleration of the disk is 4139.74\ rad/s^2.

5 0
3 years ago
Other questions:
  • A 0.050 kilogram bullet is fired from a 4.0 kilogram rifle which is initially at
    10·1 answer
  • Who expressed particles by wave equations?
    13·1 answer
  • The maximum distance from the Earth to the Sun (at aphelion) is 1.521 1011 m, and the distance of closest approach (at perihelio
    6·1 answer
  • A fragment of a collapsing gas cloud that comes to equilibrium with a central temperature of 4 million k will become a:
    11·1 answer
  • Which of the following is not true of mutations?
    13·2 answers
  • 0.403 L is equal to: <br> 4.03 mL <br> 40.3 mL <br> 403 mL <br> 4,030 mL
    15·2 answers
  • Jeremy stands on the edge of a cliff. He throws three identical rocks with the same speed. Rock X is thrown vertically upward, r
    5·1 answer
  • Small robots that can move around on the surface of a planet are called space shuttles.
    8·1 answer
  • Why do<br> stars seem to move at night?<br> ght
    15·2 answers
  • Identify the energy transformation in the image
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!