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
iogann1982 [59]
3 years ago
10

20-kilogram canoe is floating downriver at 2 m/s. what’s the kinetic energy?

Physics
2 answers:
ziro4ka [17]3 years ago
6 0

Answer:

40J

Explanation:

Kinetic energy = 1/2 mv^2

Where m = mass and

v = velocity

Given mass = 20kg

v = 2m/s

K.E = 1/2 x 20 x2^2

= 1/2 x 20 x 2 x 2

= 80/2

= 40J

ryzh [129]3 years ago
3 0

To a physicist floating next to it in another canoe, its KE is zero.

To a physicist standing on the riverbank watching it go by, its KE is 40J.

They're both correct for their own reference frame.

You might be interested in
A 60kg block is at rest on a ramp inclined at 35 degrees.
weeeeeb [17]

Answer:

Explanation:

(a)Gravitational Force is W=mg

Frictional force is f

Normal force is N

(b)Since the block is in Equilibrium therefore from diagram we can see that  

f=mg\sin \theta

f=60\times 9.8\times \sin 35

f=337.26 N

(c)Magnitude of Normal Force

N=mg\cos \theta =481.66 N

(d)friction is also given by

f=\mu mg\cos \theta

and f=mg\sin \theta

thus tan \theta =\mu

\mu =0.7  

8 0
3 years ago
I WILL MARK U BRAINLIEST IF U ANSWER THIS QUESTION! NEED IT ASAP PLS
Anuta_ua [19.1K]
  1. One common use of a convex mirror is as shaving mirror.
  2. One common use of convex mirror is as rear-view mirrors in automobiles vehicles.

<h3>What is a concave mirror?</h3>

A concave mirror is also referred to as a converging mirror and it can be defined as a type of mirror that is designed and developed with a reflective surface that is typically curved inward and away from the source of light.

Basically, one common use of a convex mirror include the following:

  • Shaving mirrors
  • Searchlights
  • Dental mirrors.

<h3>What is a convex mirror?</h3>

A convex mirror is also referred to as a diverging mirror and it can be defined as a type of mirror that is designed and developed with a reflective surface that typically bulges outward toward the source of light.

Basically, one common use of convex mirror is as rear-view mirrors in automobiles vehicles.

Read more on convex mirror here: brainly.com/question/24175067

#SPJ1

8 0
2 years ago
Which of the following is not a sedimentary structure?A) Magma emplacementB) Mud cracksC) Ripple marksD) Cross beds
lawyer [7]

Answer:

A) Magma emplacement

Explanation:

Sedimentary structures forms during deposition of sediments. It can also form after sediments have been deposited. Sedimentary structures can only be found in sedimentary rocks. Some examples include mud cracks, ripple marks, cross stratification, potholes, etc

Magma emplacement is an igneous process which describes the different mechanisms by which magma can be emplaced. It is only typical of igneous rocks.

6 0
3 years ago
during a race, a sprinter increased from 5.0 m/s to 7.5 m/s over a period of 1.25 seconds. what is the sprinters acerage acceler
Sonbull [250]
The answer would be <span>2 m/s/s</span>
3 0
4 years ago
Determine the Net Force acting on the object (represented by the solid circle) in this diagram.
wlad13 [49]

Answer:

200 N to the left

Explanation:

If we say left is negative and right is positive, then the net force is:

∑F = -300 N + 100 N

∑F = -200 N

The net force is 200 N to the left.

6 0
3 years ago
Other questions:
  • A sound wave has a frequency of 192Hz and travels the length of a football field, 91.4m in 0.267s.  What is the period?
    13·1 answer
  • Property of a moving object equal to its mass times it velocity
    14·1 answer
  • A 1200-kg station wagon is moving along a straight highway at Another car, with mass 1800 kg and speed has its center of mass 40
    6·1 answer
  • What is the mean height for the grass used as a control?
    15·1 answer
  • The brain is most active during which portion each sleep cycle
    14·2 answers
  • An applied force is a force that is applied to an object by a person or another object.
    6·1 answer
  • An iron Tyre of diameter 50cm at 288k is to be shrank on to a wheel of diameter 50.35cm.To what temperature must the tyre be hea
    7·1 answer
  • The mass of earth 6*10^24kg and radius is 400kg Now find the value of acceleration due to gravity when a object is 3600km from t
    9·1 answer
  • Please help as quick as possible
    15·2 answers
  • The triceps muscle in the back of the upper arm extends the forearm. This muscle in a professional boxer exerts a force of 2.00
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!