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insens350 [35]
4 years ago
5

A baseball is hit with a bat. The direction of the ball is completely reversed and its speed is doubled. If the actual contact w

ith the bat lasts what is the ratio of the acceleration to the original velocity?
Physics
2 answers:
alexdok [17]4 years ago
8 0
Before the impact, let the velocity of the baseball was v m/s.

After being hit by the bat its velocity is -2v
So, change in velocity, Deltav=v-(-2v)=3v
Acceleration is defined as the rate of change in velocity, i.e. actual change in velocity divided by the time taken to change it. Time taken to change velocity is the time of actual contact of the bat and ball, i.e. 0.31 s.

a=(Deltav)/(Deltat)
=(3v)/0.37
Therefore, a/v=3/0.31=9.7 s^-1
So, the ratio of acceleration of the baseball to its original velocity is 9.7.
Lubov Fominskaja [6]4 years ago
6 0

Answer:

ratio = 9.67

Explanation:

given,

initial velocity = v

final velocity  = - 2 v

change in velocity = v-(-2v)

                               = 3 v

assuming the time be t = 0.31 s

acceleration = \dfrac{change\ in\ velocity}{time}

                     = \dfrac{3v}{0.31}

                     = 9.67 v

ratio = \dfrac{a}{v} = \dfrac{9.67 v}{v}

ratio = 9.67

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611.52 <---- Is your answer

Explanation:

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8 0
3 years ago
An object wants to maintain its state of motion because it has mass. True or false
OverLord2011 [107]

Answer:

True

Explanation:

When no net force is applied to a moving object, it still comes to rest because of its inertia.

8 0
3 years ago
A net force of 16 N causes a mass to accelerate at a rate of 5 m/s^2. Determine the mass.
Gnom [1K]

Answer:

So mass of the object will be 3.2 kg

Explanation:

We have net force on the object F = 16 N

Acceleration of the object a=5m/sec^2

We have top find the mass of the object

From newton law of motion we know that force is given by

F = ma , here m is mass and a is acceleration

So 16=5\times m

m=3.2kg

So mass of the object will be 3.2 kg

3 0
3 years ago
Which of the following has the greatest amount of kinetic energy a)slice of pizza b)a person at the top of the stairs c)wind d)a
Talja [164]

Answer:

c)wind

Explanation:

Wind from the given choices will have the greatest amount of kinetic energy.

Kinetic energy is the energy due to motion of a body. It is different from the energy at rest in a body.

  • Wind is air in motion.
  • Wind energy is a form of kinetic energy in motion.

A book on a table, a slice of pizza and a person at the top of the stairs are all at rest and will possess potential energy.

7 0
3 years ago
The Steamboat Geyser in Yellowstone National Park shoots water into the air at 48.0 m/s. How
qwelly [4]

Answer:

The maximum height reached by the water is 117.55 m.

Explanation:

Given;

initial velocity of the water, u = 48 m/s

at maximum height the final velocity will be zero, v = 0

the water is going upwards, i.e in the negative direction of gravity, g = -9.8 m/s².

The maximum height reached by the water is calculated as follows;

v² = u² + 2gh

where;

h is the maximum height reached by the water

0 = u² + 2gh

0 = (48)² + ( 2 x -9.8 x h)

0 = 2304 - 19.6h

19.6h = 2304

h = 2304 / 19.6

h = 117.55 m

Therefore, the maximum height reached by the water is 117.55 m.

7 0
3 years ago
Read 2 more answers
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