Nearly all physics problems will use the unit m/s^2 for acceleration. Explain why the seconds are squared. Why isn't the unit given as m/s, as it is for speed

Answers

Answer 1

Answer:
Because acceleration is not speed, and speed is not acceleration.
I'm sure you would not ask "Why isn't temperature given in acres,
as it is for area ?" Speed and acceleration are different things, so
it's only natural that they have different units.

The magnitude (size) part of acceleration is:

   (how much speed changes) per second.

Are you speeding up ?
Are you traveling (2 meters per second) faster every second ?
Then your acceleration is

   (2 meters per second) per second .

When you write that phrase as an algebraic expression, it's

   (2 m/sec) / sec

and when you simplify that fraction, you get    2 m/sec² .

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Forces always act in pairs.

True
False

Answers

Truer words were never written. Forces do indeed always act in pairs.

The answer to this question would be True

a string is attached to the rear-view mirror of a car. a ball is hanging at the other end of the string. the car is driving around in a circle, at a constant speed. which of the following lists gives all of the forces directly acting on the ball?

Answers

The correct answer for the question that is being presented above is this one: "b. tension, gravity and centripetal force." It gives all of the forces directly acting on the ball.

Here are the following choices:
a. Tension and gravity
b. tension, gravity and centripetal force
c. Tension
d. Tension gravity centripetal force and frictional force

Earth, the Sun, and billions of stars are contained within

Answers

I think it is the Milky Way.

In the Milky Way galaxy

Fusion occurs in the _______ of the Sun, where the pressure and temperature are very high.

Answers

Nuclear fusion occurs in the CORE of every star, where
the pressure and temperature are very high.

If fusion does not take place in the core, then you don't have a star.

Answer:

nucliare fussion happens in the core of the sun

Explanation:

What type of exoplanet would you expect to cause the largest Doppler shift in the spectrum of its star? a.) A massive planet that is close to the sun b.) A low mass planet that is close to its sun c.) an average mass planet that is at an average distance from its sun d.) A massive planet that is far from its sun e.) a low mass planet that is far from its sun

Answers

Answer:

Explanation:

Ted wants to hang a wall clock on the wall by using a string. If the mass of the wall clock is 0.250 kilograms, what should be the tension of the string so that it can sustain the weight of the wall clock?

Answers

The clock is pulling the force towards earth's center because of gravity.
That force is equal to:
F = m*g where g is gravitational acceleration.

We will take that g = 9.81m/s^2

Now:
F = 0.25 * 9.81 = 2.4525 N

The string needs to sustain that force, therefore minimum Force that string has to be able to sustain is:
2.4525 N

The answer is 2.45 newtons because 1 kg = 9.8 newtons so when we use that ratio, we get around 2.45 newtons for 0.25 kg. This would be your (B) option I think.

Other Questions

Scientific notation 47,000

Which of the following would have the highest power rating? 500 J of energy used in 100 seconds 1,000 J of energy used in 100 seconds 500 J of energy used in 50 seconds 1,000 J of energy used in 50 seconds

PLEASE HELP. Really important

Flatworms can be cut in half, creating two new individuals, by _____.binary fissionmultiple fissionfragmentationbudding