PHYSICS HIGH SCHOOL

A toy mouse has a mass of 4 kg and kinetic energy of 32 J. What is its speed? A. 6 m/s B. 3 m/s C. 5 m/s D. 4 m/s

Answers

Answer 1
Answer:

32/4= 8

8/2=4

Answer : D. 4 m/s
Answer 2
Answer:

Answer:

D. 4 m/s

Explanation:

If a toy mouse has a mass of 4 kg and kinetic energy of 32 J, its speed is 4 m/s.

32 ÷ 4 = 8

8 ÷ 2 = 4

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a body that has a mass of 0.04 k g is thrown up with a speed of 60m/s. Kinetic energy? a) in the begining,b)after 6 seconds​

Answers

Answer:

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What is the gravitational force acting on a 70.0 kg object standing on the earth's surface ?

Answers

g( gravitational acceleration)=-9.81 m/s^2
m(mass) = 70.0 kg

According to Newton's second law of motion:

"F=ma"

Force is equal mass per acceleration therefore

W=mg
This is because weigth is the force of gravity acting in a body and "a" is replaced by "g" because "g"
is gravitational acceleration

Therefore:

W= mg
W= (70.0 kg) (-9.81m/s^2)
W= -686.7 N

* The "N" means newton which is (kg* m/s^2)

Final answer:

The gravitational force acting on a 70.0 kg object on Earth is calculated using the formula w=mg and is equal to 686 N.

Explanation:

The gravitational force acting on a 70.0 kg object standing on the earth's surface can be calculated using the formula for weight (which is essentially the gravitational force on the object): w = mg, where m is the mass of the object and g is the acceleration due to gravity. On Earth, g is approximately 9.8 m/s².

Therefore, the gravitational force (weight) acting on this object can be calculated as follows: w = mg = (70.0 kg)(9.8 m/s²) = 686 N. Thus, the gravitational force on this 70.0 kg object standing on the earth's surface is 686 Newtons. It's important to understand that this force will vary if the object is moved to a location where g is different, like on the moon.

Learn more about Gravitational Force here:

brainly.com/question/32609171

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How much time would it take for an airplane to reach its destination. If it traveled at an average velocity of 790km/hr east for a distance of 4,700 kilometres

Answers

It would be 5.94 hours but you can round it to just 6 hours.

What is the motion of a body when only the force of gravity is acting on it

Answers

When only the force of gravity acts on an object,
the situation is called "free fall".

The motion is uniformly accelerated.  The object falls
straight toward the center of the other object in whose
gravity it shares, and its speed increases at a constant
rate. 

When this happens on or near the surface of the Earth,
the rate is (9.8 meters per second greater) for each
second of falling.

True free-fall is never observed in daily life.  Whenever
we see an object falling, it is always falling through air,
which counteracts the force of gravity to a greater or
lesser degree, depending on the object's size, shape,
weight, surface texture, and speed through the air.

When a marble is at rest what happened

Answers

The marble will stay in place until another force pushes it

Answer: the marble will remain in place at a constant velocity of zero

Explanation:

Newton's first law states that a body at rest will remain at rest, and a body in motion will remain in motion in a straight line at a constant velocityunless acted upon by an outside force

What can you assume has happened if an electron moves to a higher energy level

Answers

EXPLANATION :

As per the question, the electron has jumped from ground state to higher energy level.

From Bohr's postulate, we know that electron can only move to higher excited state when the energy equivalent to excitation energy has been given to it. Otherwise, the electron can not move from ground state to the excited state.

Hence, it is obvious that the electron might have excited to higher energy level by providing sufficient energy from outside.

The external source might be light of suitable frequency or  any electric or thermal source.
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