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
PIT_PIT [208]
1 year ago
8

A donkey pulls a crate up a rough, inclined plane at constant speed. Which one of the following statements concerning this situa

tion is false
Physics
1 answer:
asambeis [7]1 year ago
8 0

The statement Gravity exerts zero joules of energy on the object is false.

<h3>What is gravity?</h3>
  • The force of attraction between any two objects in the universe is known as gravity or gravitational force.
  • The mass of the object and the square of the distance between them determine the force of attraction.
  • The weakest known force in nature, it is by far.
  • The force that pulls items toward the center of a planet or other entity .
  • All of the planets are kept in orbit around the sun by gravity.
<h3>What is work?</h3>
  • Work is defined as the energy that is applied to or removed from an object by applying force along a displacement.
  • It is frequently described in its most basic form as the result of force and displacement.

Learn more about work here:

brainly.com/question/18094932

#SPJ4

You might be interested in
What's the airplane velocity when it flies 100 miles in 20 seconds<br><br>​
Allushta [10]

Answer : 5m/s

Explanation:the formular for velocity is distance /time or you can say displacement /time. Then it would then be

100/20 =5m/s

3 0
2 years ago
Read 2 more answers
In the picture at left. The launch height is 10m ball B mass 5kg has a launch velocity of 12 m/s and ball A mass 8 kg has a laun
Hitman42 [59]

Answer:

24

Explanation:

8 0
3 years ago
After coming down a slope, a 60-kg skier is coasting northward on a level, snowy surface at a constant 15 m&gt;s. Her 5.0-kg cat
Vinil7 [7]

To solve this exercise, it is necessary to apply the concepts of conservation of the moment especially in objects that experience an inelastic colposition.

They are expressed as,

m_1v_1+m_2v_2 = (m_1+m_2)v_f

Where,

m_1= mass of the skier

m_2= mass of the cat

v_1 = initial velocity of skier

v_2 = initial velocity of cat

v_f= final velocity of both

Re-arrange to find V_f we have,

V_f = \frac{m_1v_1+m_2v_2}{(m_1+m_2)}

V_f = \frac{(60)(15)+(5)(-3.8)}{(60+5)}

V_f = 13.55m/s

Once the final velocity is found it is possible to calculate the change in kinetic energy, so

\Delta KE = KE_i-KE_f

\Delta KE = \frac{1}{2}(m_1v_1^2+m_2v^2_2)-\frac{1}{2}(m_1+m_2)v_f^2

\Delta KE = \frac{1}{2}((60)(15)^2+(5)(-3.8)^2)-\frac{1}{2}(60+5)(13.55)^2

\Delta KE = 819.1J

Therefore the amount of kinetic energy converted in to internal energy is 819J

3 0
3 years ago
If 2N force is applied on 2 kg mass due east and same magnitude of force due west, thechange in velocity of the body in 2 sec is
klio [65]

Explanation:

F=m(v-u)/t

F=2N

m=2kg

t=2s

2=2(v-u)/2

cross multiply

2*2=2(v-u)

4=2(v-u)

4/2=v-u

v-u=2m/s

v-u is the change is velocity.

3 0
2 years ago
A propeller is modeled as five identical uniform rods extending radially from its axis. The length and mass of each rod are 0.77
Vikki [24]
The formula for the rotational kinetic energy is

KE_{rot} = \frac{1}{2}(number \ of\ propellers)( I)( omega)^{2}

where I is the moment of inertia. This is just mass times the square of the perpendicular distance to the axis of rotation. In other words, the radius of the propeller or this is equivalent to the length of the rod. ω is the angular velocity. We determine I and ω first.

I=m L^{2}=(2.67 \ kg) (0.777 \ m)^{2}  =2.07459 \ kgm^{2}

ω = 573 rev/min * (2π rad/rev) * (1 min/60 s) = 60 rad/s

Then,

KE_{rot} =( \frac{1}{2} )(5)(2.07459 \ kgm^{2}) (60\ rad/s)^{2}

KE_{rot} =18,671.31 \ J

6 0
3 years ago
Other questions:
  • Monochromatic light with a wavelength of 384 nm passes through a single slit and falls on a screen 86 cm away. If the distance o
    12·1 answer
  • How is energy transfer related to the ozone layer and its temperature?
    6·1 answer
  • What r three positive results of a variation within a population that occur due to natural selection
    7·1 answer
  • As a car skids to a stop, friction transforms kinetic energy to
    14·1 answer
  • An atom is the most __________ unit of living and nonliving things.
    8·2 answers
  • ¿Cuál es la magnitud y dirección de la aceleración de los cuerpos en caída libre en el planeta Tierra?
    13·1 answer
  • A wave x meters long has a speed of y meters per second. The frequency of the wave is
    7·1 answer
  • A type of energy work that utilizes touch and visualization
    14·1 answer
  • A car traveling at 37m/s starts to decelerate steadily. It comes to a complete stop in 15 seconds. What is it’s acceleration
    15·1 answer
  • The potential energy of an object is 16.0 joules. The object is 145cm high.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!