The cheetah, which is the fastest land mammal, can accelerate from 0.0 mi/hr to 70.0 mi/hr in 3.0 seconds. What is the acceleration of the cheetah? Give your answer in units of mph/sec.

Answers

Answer 1
Answer: Initial velocity of Cheetah(V1) = 0.0 mi/hr
Final velocity of Cheetah(V2) = 70 mi/hr
Time for acceleration(T) = 3 seconds.
We know the formula
Accelaration(A) = Velocity/Time
So
A = (V2 -V1)/T
   = (70 -0)/3
   = 70/3
   = 23.33mph/sec
So the accelaration of the Cheetah is 23.33 mph/sec.

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Answers

The average kinetic energy of the atoms that make up a substance which is changing from a liquid to a solid is decreasing. The answer is letter A. This  is because there is more room for movement of atoms if the pahse is in liquid than in solid.

If an object is NOT accelerating, then one knows for sure that it is ___.A. at rest
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Answers


"Zero acceleration" means "velocity" that's not changing.

Sadly, it seems that both of these words are almost always
misinterpreted and misunderstood. "Acceleration" does NOT
mean "speeding up", and "velocity" does NOT mean speed.

"Velocity" is the speed AND direction of motion.  So, for example,
'30 miles per hour north' and '30 miles per hour west' are the same
speed but different velocities.

"Acceleration" is ANY change in speed OR direction.  Consider three
different families in three different cars.  One car is speeding up, one is
slowing down, and the third is driving around a curve at a steady speed.
ALL three of the cars are accelerating.

Answer:

Zero acceleration means velocity that's not changing.

Explanation:

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b. particles that travel in a reverse direction to the direction of energy movement
c. particles that travel perpendicular to the direction of energy movement
d. particles that travel in an intersecting direction to the direction of energy movement

Answers

the answer is C. they travel perpendicular to the direction of energy

Answer:

The answer is C

Explanation:

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Answers

amnesia is the most common illness used in tv an films

The most common memory disorder in a show or movie is Alzheimer's Disease

An object moving in a circle at a constant speed is accelerating. Why?A. because it is going faster
B. because it has constant velocity
C. because its direction is changing
D. because the distance it is traveling is changing

Answers


"Acceleration" does NOT mean 'speeding up'.  It means any change
in the speed or direction of motion ... speeding up, slowing down, or
moving in a curve.

An object moving in a circle at a constant speed is accelerating, because
when you're moving along a circle, your direction is constantly changing.

A. Because it is going faster.

Recall that the height of an object t seconds after it begins moving when gravity is the only force acting on the object is given. h(t)=-16x^2 + v0t + h0. h(t) is given in feet. v0 = initial velocity of object in ft/sec. ho= initial height of object in feet. If the feather is dropped from the top of the bridge 90 feet above a river, how long does it take the feather to reach the water?

Answers

That's pretty easy, have a look :

h(t)=−16x2=v0t+h0
v0=0 ft/sec
h0=90 ft

The only thing you need to do is to find t and the problem is solved.

Answer:

Time taken, t = 2.37 seconds

Explanation:

It is given that,

Height of an object at time t is given by :

h(t)=-16t^2+v_0t+h_0

Where

v₀ is initial velocity of object

h₀ is initial height of the object

The feather is dropped from the top of the bridge 90 feet above a river. we have to find the time taken by the feather to reach the water.

At the surface of water, h(t) = 0 and v₀t = 0

So, 0=-16t^2+0+90

t = 2.37 seconds

The feather will take 2.37 seconds to reach the water surface.