PHYSICS HIGH SCHOOL

A car of mass 1500 kg is travelling at a speed of 20m/s. Calculate its kinetic energy

Answers

Answer 1

Answer:

Given,

Mass, m=1500kg

Velocity, v=20m/s

KE= 1/2mv^2

KE=1/2 x 1,500 x 20^2

KE=300000 J

KE=300 kJ

Related Questions

_____ kilometers per second is the approximate speed of light.a. 300 b. 3,000 c. 30,000 d. 300,000
A spider is crawling on a wall. First it crawls 1 meter up, then 1 meter to the left, and then 1 meter down. what is its total displacement
A pendulum has 576 J of potential energy at the highest point of its swing. How much kinetic energy will it have at the bottom of its swing?
Discuss how lawmakers could use scientific knowledge to help them make decisions that would benefit society.
What is the kinetic energy of an object that has a mass of 30kg and moves with a velocity of 20 m/s?A. 6,000J B. 12,000J C. 5,880J D. 2,940J

Only answer if you know all of themThe connections between neurons in the retina, specifically the connections referred to as “lateral inhibition,” help us see which of the following better?

AContrast
BFaces
CColors

Improving the contrast of an image (making the dark regions darker and the light regions lighter) helps us to identify:

AThe edges of objects
BThe center of objects
CThe color of an object

What assumption does our visual system make in order to see curved surfaces (domes, holes)?

ALight comes from above
BCurved surfaces are always evenly lit
CCurved surfaces are always easy to see, no assumptions are made

Which part of the face does our brain pay the most attention to?

AEyes and mouth
BEyes and ears
CEyes and chin

If all these assumptions sometimes lead to mistakes, for example in these optical illusions, why do we make them?

AIt helps us see things faster
BIt helps us see things correctly
CIt helps us pay attention to what's important
DAll of the above

Answers

1)
The connections between neurons in the retina, specifically the connections referred to as “lateral inhibition,” help us see which of the following better?

A) Contrast
B) Faces
C) Colors

2)
Improving the contrast of an image (making the dark regions darker and the light regions lighter) helps us to identify:

A) The edges of objects
B) The center of objects
C) The color of an object

3)
What assumption does our visual system make in order to see curved surfaces (domes, holes)?

A) Light comes from above
B) Curved surfaces are always evenly lit
C) Curved surfaces are always easy to see, no assumptions are made

4)
Which part of the face does our brain pay the most attention to?

A) Eyes and mouth
B) Eyes and ears
C) Eyes and chin

5)
If all these assumptions sometimes lead to mistakes, for example in these optical illusions, why do we make them?

A) It helps us see things faster
B) It helps us see things correctly
C) It helps us pay attention to what's important
D) All of the above

Hope that helps :)
*the correct answers are bolded, italicized, and underlined.*

How many types of quarks are there?
a. 2
b. 4
c. 6
d. 8

Answers

There are 6 types of quarks.

Answer: C. 6

The are 6 types of quarks: up, down, strange, charm, top, and bottom.
The answer:

C.6

A ball with a mass of 1.5 kilograms is tied to the end of a rope. The ball is pulled to a height of 0.5 meters above the ground and released.The ball has joules of potential energy at position B. At position A, all of the energy changes to kinetic energy. The velocity of the ball at position A is meters/second. Assume there’s no air resistance. Use g = 9.8 m/s2 , PE = m × g × h, and

Answers

Solve the potential energy at point B

PE = mgh

Where m is the mass

G is the acceleration due to gravity 9.8 m/s2

H is the height

PE = ( 1.5 kg) ( 9.8 m/s2) (0.5 m)

PE = 7.35 J

Solve the velocity using the

KE = 0.5mv^2

Where ke is the kinetic energy

M is the mass

V is the velocity

Since all energy is converted to KE

So KE = PE

7.35 = 0.53(1.5) v^2

V = 3.13 m/s

The velocity of the ball at position A is equal to 3.13 m/s.

Given the following data:

Mass of ball = 1.5 kilograms.

Height = 0.5 meters.

Acceleration due to gravity = 9.8 $m/s^2$

How to calculate potential energy.

Mathematically, potential energy is given by this formula:

$P.E = mgh\n\n$

Where:

m is the mass.

h is the height.

g is acceleration due to gravity.

Substituting the given parameters into the formula, we have;

$P.E = 1.5 * 9.8 * 0.5$

P.E = 7.35 Joules.

Assuming there’s no air resistance, the potential energy would be equal to kinetic energy.

$P.E = K.E\n\n7.35 = (1)/(2) mv^2\n\nmv^2 = 7.35 * 2\n\n1.5v^2 = 14.7\n\nv=\sqrt{(14.7)/(1.5) } \n\nv=√(9.8)$

V = 3.13 m/s.

Read more on potential energy here: brainly.com/question/1242059

The conversion of carbon dioxide to oxygen by plants is called _____. A. polysynthesis B. photosynthesis C. amino-acid synthesis D. amino-acid production

Answers

The conversion of carbon dioxide to oxygen by plants is called photosynthesis.

The answer would be B, photosynthesis.
Using the process of elimination, the answer is easy to find.

Polysynthesis - The act or process of combining many separate elements into a whole (Free Dictionary)

Amino-acid Synthesis - No definition, but this is clearly not the answer as amino acid has nothing to do with carbon dioxide or oxygen.

Amino-acid Production - This doesn't work for the same reason as the last one. Amino acid is irrelevant.

Therefore, the answer is photosynthesis.

A train leaves the station at the 0.0m marker traveling with a constant velocity of 45.0 m/s. How manyseconds later will the train pass the 1500.Om marker? What is the velocity of the train in km/h?

Answers

The train will pass the 1500.0m marker 33.33 seconds after leaving the station. Its velocity is 162.0 km/h.

How to evaluate time the train will pass the 1500.0m marker and it's velocity

To find the time it takes for the train to pass the 1500.0m marker, we can use the formula: time = distance / velocity. Plugging in the values,

time = 1500.0m / 45.0 m/s

time = 33.33 seconds.

To convert the velocity from m/s to km/h, we use the conversion factor: 1 m/s = 3.6 km/h. Therefore,

velocity = 45.0 m/s * 3.6 km/h/m/s

velocity = 162.0 km/h.

In summary, the train will pass the 1500.0m marker approximately 33.33 seconds after departing the station, and its velocity will be 162.0 km/h

Read more about velocity here: here:brainly.com/question/80295

#SPJ3

Answer:

119.88 km/h

Explanation:

1500/45=33.3

use a m/s to km/h calculator

put in 33.3 for m/s and you will get 119.88 km/h.

119.88 km/h.

F=5560Kg x 2.55m/s². I need help solving this