Which of these is an example of Newton’s first law of motion?

A. A basketball bounces on the ground with the same force that the ground pushes up on the ball.

B. A person standing on a bus moves backward when the bus suddenly moves forward.

C. A person jumps to a dock from a boat, and the boat moves away from the dock.

D. A baseball hit with a baseball bat travels faster than a bowling ball hit with the same force

Explanation:

w = v/r

= 15/ 45 = 1/3 rads-¹

a = w²r

= 1/9 • 45 = 5 ms-²

F = mv²/r

= 1200• 15• 15/45

= 6000N

The car, when rounding the curve, is pulled towards the center by the friction between it's wheels and the road.

Answer:

mechanical

Explanation:

the energy is carried by water <3 hope this helped

Answer:

[tex]F_{k} = 9854N[/tex] Opposite to the motion of the car.

Explanation:

Please find the detailed solution below

Answer:

1.66 x 10^-6 m

Explanation:

Answer:

intellectual disabilities

Founded in 1968 by Eunice Kennedy Shriver, Special Olympics provides people with intellectual disabilities continuing opportunities to realize their potential, develop physical fitness, demonstrate courage and experience joy and friendship.

Explanation:

Answer:

true

Explanation:

i did the test

Answer:

Explanation:

Remark

The answer is in the formula

E = I * R

Solution

Let the resistance = R

I = 12/R

If we increase the resistance by 20% then we get

R1 = R + (20/100) * R

R1 = R + 1/5 * R

R1 = 6 R/5

What happens to I when you do this

I = 12/(6/5 R)       Effectively you need to treat 6/5 as a reciprocal

I = 12 * 5/6 * R

I = 10 / R

What does this tell you? Since the Resistance has a base value of R, when increased by 20%, the numerator of the fraction is reduced to 10 from 12. In other words the current  is now smaller when R goes up.

Answer:

2.5 kg - m/s

Explanation:

Momentum = m * v = .5 * 5 = 2.5  kg-m/s

The height to which the weight-watcher must climb to work off the equivalent 991 (food) Calories is 0.59 Km

1 food calorie = 103 calories

Therefore,

991 food calories = 991 × 103

991 food calories = 102073 calories

Multiply by 4.2 to express in joule (J)

991 food calories = 102073 × 4.2

991 food calories = 428706.6 J

E = mgh

Divide both side by mg

h = E / mg

h = 428706.6 / (73.9 × 9.8)

h = 591.95 m

Divide by 1000 to express in km

h = 591.95 / 1000

h = 0.59 Km

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When a star is so dense that its atoms have their electrons smashed in toward the nucleus (resulting in densities about a million times greater than water), the resulting material is called a Neutron star.

Stars are present in the galaxy that have the ability to generate their own light. They are both quite hot and very huge.

They are largely formed of hydrogen, with a trace of helium thrown in for good measure.

The sun is also a star, and its energy and light play an important part in the survival of all kinds of life on Earth.

When a star is so dense that its atoms have their electrons smashed in toward the nucleus (resulting in densities about a million times greater than water), the resulting material is called a Neutron star.

Hence the correct answer is a neutron star.

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Answer:

Etiquette determines which behaviors are polite and impolite among players and team. It is a code of polite conduct according to social norms and efficiency. Etiquette as a societal rule is formed to enhance positive human relation when interacting and can reduce conflicts in the society. A person who is aware of the etiquette in a given situation will be more confident, comfortable and competent thus making even those around him or her at ease.

Answer:

मार्क ASL brainlisessjd

Answer:

3904 Meters

Explanation:

F = ma

work = F * d

89.1 (9.8)* d        = 815000/.23906                                                                                                     conversion factor  1 j = .23906 cal

d = 3904 meters

Answer:

8.16 seconds, enjoy physics

A 1,500kg boulder falls off a 120m tall cliff on a planet that has a surface gravitational field of magnitude 3. 6 N/kg. Assume that the planet has no atmosphere, it would take 8.16 seconds for the boulder to strike the ground

There are three equations of motion given by  Newton

The first equation is given as follows

v = u + at

the second equation is given as follows

S = ut + 1/2×a×t²

the third equation is given as follows

v² - u² = 2×a×s

Note that these equations are only valid for a uniform acceleration.

where u and v are the initial and final velocity respectively

S is the total distance covered by the object

a is the acceleration of the object

As given in the problem a 1,500kg boulder falls off a 120m tall cliff on a planet that has a surface gravitational field of magnitude 3. 6 N/kg. Assume that the planet has no atmosphere

S = 120m, the initial velocity of the boulder is zero

u = 0

g = 3.6 m/s²

S = ut + 1/2at²

u= 0m/s , a= 3.6 m/s² and t = ? seconds

120  = 0×t + 0.5×3.6×t²

t² = 120 /(3.6×0.5)

t² = 66.667

t = 8.16 seconds

Thus, it would take 8.16 seconds for the boulder to strike the ground

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Explanation:

A projectile (Cannon ball) is launched at an angle to the horizontal and rises up to a peak while moving horizontally. When it reaches the peak, the projectile starts to fall.

Answer:

virtual, upright, smaller

Explanation:

yes

Answer:

torques must balance for equilibrium

counterclockwise = clockwise

1.5 X = 4 * 20

x = 80 N-m / 1.5 m = 53 N

(D) is correct

Answer:

See below

Explanation:

Coulomb's Law    Force = k q1 q2 / r^2

k = Coulomb's constant = 8.9875517 x 10^9  kg m^3 /s^2 C^2

    Force =  8.9875517 x 10^9   * 7 * 5  / (5925^2)  = 8960.5102 N

The equation is not balance because the law of conservation of mass is not being followed.

The hydrogen and chlorine atoms have different numbers of atoms in the reactants and products which is not balance on both sides i.e. reactant and products.

So we can conclude that the equation is not balance because the law of conservation of mass is not being followed.

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Answer:

n Hz

Explanation:

I think I'm Sry if it is wrong.

Answer:

The answer for cos(30°) is 0.87

When an object in simple harmonic motion is at its maximum displacement, its acceleration is also at a maximum.

Reason: The speed is zero when the simple harmonic motion is at its maximum displacement, however, the acceleration is the rate of change of velocity. The velocity reverses the direction at that point therefore its rate of change is maximum at that moment. thus the acceleration is at its maximum at this point

Hope that helps!

Hubble space telescope, Hubble deep field guide, moon, mercury, Saturn, sun, galaxy messier 101

Answer:

1-Hubble Deep Field Galaxy

2-Galaxy Messier 101

3-Sun

4-Saturn

5-Mercury

6-Moon

7-Hubble Space Telescope

Answer:

C: Every mass exerts a gravitational force on every other mass

This statement is true

Answer:

i dont know but ill update you

We can confirm that when you travel in an elevator, the utricle and saccule detect when the elevator is moving.

These are small organs located in the inner ear. They serve a very important function in our everyday life. These otolith organs are responsible for the detection of movement and provide us with a sense of spatial orientation. They accomplish this by stimulating very small, hair-like cells with a specialized fluid.

Therefore, we can confirm that when you travel in an elevator, the utricle and saccule detect when the elevator is accelerating or decelerating.

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Marley was the victim of a hoax. The synonym of the hoax is a practical joke, joke, jest, prank, trick, jape, and fraud.

To dupe someone into believing or accepting something untrue and frequently absurd as genuine.

A practical joke, joke, jest, prank, trick, jape, and scam are all synonyms for a hoax.

Marley stayed up late to watch the planet Mars rise in the east. She had read online that Mars was unusually close to the Earth in its orbit and would look nearly as large as the moon.

However, she only saw stars, and the next morning she ended up oversleeping because of her late bedtime. Marley was the victim of a hoax.

Hence a hoax is a correct answer.

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Answer:

11.98 N

Explanation:

Normal force =   mg =  2.03 * 9.81

coeff of static friction must be overcome for the book to begin moving

       .602 = F / (2.03 * 9.81)   = 11.98  N