PHYSICS HIGH SCHOOL

The diagram shows a person holding a bow and arrow. Which will most likely increase the kinetic energy in this system? a not releasing the string b increasing the mass of the arrow c releasing the string d pulling back less on the string

Answers

Answer 1
Answer:

Answer:

releasing the string.

Explanation:

ed2020
Answer 2
Answer:

Answer:

b. Increasing the mass of the arrow.

Explanation:

The formula is K=1/2mv^2. Increasing the mass also increases the kinetic energy.

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Visible light is an example of?
Sarah throws a ball directly upward at the edge of a cliff with a starting velocity of 3.0 m/sIt lands on the ground with a final speed of 6.0 m/sHow long is the ball in the air?Round the answer to two significant digits

Which scientist would best describe the motion of the earth?Ptolemy
Brahe
Kepler
Newton

Answers

Answer:

Newton

Explanation:

Ptolemy usually talked about "Earth-centered," or "geocentric" theory that all celestial objects — including the planets, Sun, Moon, and stars — orbited Earth. Earth, in the center of the universe, did not move at all and obviously this theory has been proven wrong.

Brahe model had all the planets (except Earth) orbiting around the Sun, but then the Sun orbited around the Earth. This is also a wrong concept.

Kepler's Laws are mostly based upon the Planetary Motion and are incomplete is some areas.

Only Newton law best describes the motion of all planets where he says that all motion, whether it was the orbit of the Moon around the Earth or an apple falling from a tree, followed the same basic principles.
Newton has the theory

YAHOO ANSWERSA 1260 kg car moving south at 12.9 m/s collides with a 2430 kg car moving north. The cars stick together and move as a unit after the collision at a velocity of 4.38 m/s to the north. Find the velocity of the 2430 kg car before the collision.

Answers

Explanation:

Below is an attachment containing the solution.

Which device is using a motor?A water heater creates heat energy from electric energy.

A waterfall rotates a waterwheel to turn an axle.

A body massager uses electric energy to move back and forth.

A solar charger creates electric energy from the Sun.

Answers

Out of all the options, only body massager which uses electric energy to move back and forth is using motor here. It is because a motor converts electrical energy to Mechanical energy and only massager obeys it among all the options.

In short, Your Answer would be Option C

Hope this helps!

Answer:  C.

A body massager uses electric energy to move back and forth.

Explanation:

An increase in which quantity will result in an increase in momentum?

Answers

Momentum = (mass) x (velocity)

(Remember that momentum is a vector ... it has a direction.
Its direction is the same as the velocity.)

An increase in either mass or velocity will increase the momentum.

It's pretty hard to increase the mass of a moving object, so I think
the better answer is velocity .

Ferns are located in which zone of deciduous forests?a. tree stratum
b. small tree and sapling
c. shrub
d. herb

Answers

A fern is a vascular plant that have neither seeds nor flowers. Fern spieces live in the variety of habitats: shady forests, acid wetlands and tropical areas. Tree stratum zone contains the tallest trees. The small tree zone is lower than tree stratum zone. The shurb zone contains schurbs which grow the food for animals. Finally, the herb layer is made up of wildflowers and ferns. Answer: D ) Herb zone.
D. Herb
I hope that helps! :)

A 25 newton force applied on an object moves it 50 meters. The angle between the force and displacement is 40.0°. What is the value of work being done on the object?

Answers

The total work done is 957.56 joules. This is calculated as work is equal to 25N time 50 meters time cosine 40 degrees.

Answer:

Work being done on the object = 766.04J

Explanation:

Work done by a force  is calculated by finding dot product of force and displacement.

            W = F . s

             F = 25 N

              s = 50 m

               θ = 40.0°

W = F . s = Fs cosθ = 25 x 40 x cos 40 = 766.04J

Work being done on the object = 766.04J
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