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
zhuklara [117]
3 years ago
6

A system is a group of objects that’s analyzed as one unit. Consider a car moving along a road that has a flat section and a hil

l. The energy of the car at any given time is equal to the energy that its engine provides minus the energy that the car. When the car moves along the flat section, all of its energy is , which is calculated from its velocity and . When the car moves uphill, some of its energy is transformed to , which is calculated from its gravity, height, and .
Physics
1 answer:
vladimir1956 [14]3 years ago
8 0

Answer:

a) Em= K +U,  b) Em= K

Explanation:

The system in this case is formed by the mobilizes and the hill.

Let's write the expressions correctly and completely.

a) When the car moves in the path, the mechanical energy is the siua of the kinetic energy of the car and the potential energy of the car when going up the hill.

              Em = K + U

be) when the car moves in the flat part all the mechanical energy is formed by its kinetic energy that is calculated with the mass and speed of the car

             Em = K

c) When the car goes up the hill the energy the mechanical energy is conserved, but part of the kinetic energy is transformed into potential energy.

You might be interested in
a skier is gliding along 3.0 m/s on horizontal, frictionless snow. he suddenly starts down a 10 degrees incline. his speed at th
Elza [17]
... find length
(way 1) determine acceleration using force
only force act on skier is mg vertically. spilt vector we get force along the incline = mgsin(10) and f= ma so
ma = mgsin(10) or a = gsin(10)
a (along the incline)= gsin(10) = 10sin(10) = 1.74
v^2 = u^2 + 2as
15^2 = 3^2 + 2(1.74)s
s = 62.06 m

(way 2) using conservation of energy
energy (KE+PE) on top = energy at bottom
0.5m3^2 + mgh = 0.5m15^2 +0
h (height of incline) = (112.5 - 4.5)/10 = 19.8 m
length of incline = h/sin(10) = 62.2 m ; trigonometry

... find time
s = (u+v)t/2
t = 2s/(u+v) = 2(62.2)/(3+15) = 6.91 s
4 0
3 years ago
What is it called when there’s an atom that has fewer neutrons than protons and more electrons than protons??l
HACTEHA [7]

Answer: The answer is an atom.

Explanation: This is because an atom has fewer neutrons than protons and more electrons than protons

6 0
3 years ago
If the net force on a 75 - N object is 375 N from the left in what direction will the object move
Katen [24]
It would move to the right because the force is being applied from the left.
5 0
3 years ago
Read 2 more answers
HELP PLS WHAT IS Y COMPONENT
jeka94

Answer:

11.5

Explanation:

you do 12(sin 73.3) because its on the y you do sin

6 0
3 years ago
4. A hiker leaves camp and using a compass walks 4 km East, 6 km South, 3 km East, 5 km North, 10 km West, 8 km North and 3 km S
PSYCHO15rus [73]

Answer:

Because the hiker walked directly west and then directly north the two legs of the hike forms a right triangle. Therefore we can use the Pythagorean Theorem to solve this problem.

 

c=5

The hiker is 5km from camp and should head in a generally south-east direction

7 0
3 years ago
Other questions:
  • Three joggers are running along straight lines as follows: Jogger A, with a mass of 55.2kg, is traveling along the line y=6.00m
    7·1 answer
  • If the diameter of the red marble is 3.0 cm, and by using the formula for volume, what is a good approximation of its volume? cm
    14·1 answer
  • A soccer player is running upfield at 10m/s and comes to a stop in 3 seconds facing the same direction. What is his acceleration
    6·2 answers
  • A baseball thrown from the outfield to home plate does not have which of the following types of energy while it's in the air? A.
    9·1 answer
  • Which of the following is an electromagnetic wave?
    15·2 answers
  • The amount by which a machine multiplies input force is known as
    7·1 answer
  • You are standing on a sheet of ice that covers the football stadium parking lot in Buffalo; there is
    12·2 answers
  • 6. A stomp rocket takes 1.5 seconds to reach its maximum height
    8·1 answer
  • ANSWER ASAP!!!!!
    13·1 answer
  • Calculate the velocity of an object.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!