All categories

3 years ago

When you throw a ball the work you do to accelerate it equals the kinetic energy the ball gains?

1 answer:

7 0

In short yes. However, lets say you lift a ball of the ground. and release it. you do not accelerate it by any means however it has kinetic energy as it is clearly moving. what happened there is the distance from the ground is potential energy once you release it it becomes kinetic energy.

when you throw a ball you use the potential stored energy in your muscles and convert it to kinetix energy as you move your hand. at the release the ball has gained nearly all that energy. some is lost in heat and friction.

You might be interested in

A meter stick balances horizontally on a knife-edge at the 50.0 cm mark. With two 5.12 g coins stacked over the 24.2 cm mark, th

pashok25 [27]

Answer:

The mass of the meter stick is $1.66054054054g$

Explanation:

Here since the meter stick is in equilibrium position its net torque and net force should be equal to zero

Since at the begging the meter stick is balanced at center of the meter stick that means its center of mass should be present at $50.0cm$

Now lets consider the later case where stick is balanced by two 5.12 g coins .

Here torque due to two coins = $t_{c} = 5.12\times(27.8-24.2)\times2\times9.8$

Torque due to weight of meter stick = $t_{m}$ = $m\times(50-27.8)\times9.8$

where m = mass of the meter stick

Here $t_{c} = t_{m}$ .

Upon equating we will be getting mass of the meter stick = $1.66054054054g$

4 0

3 years ago

Using your best estimates, how many times would you have to slap a 1 kg rotisserie chicken in order to cook it? You can assume t

FromTheMoon [43]

Answer:

n= 16021.03 slaps

Explanation:

Using law of Energy conservation

E_{thermal}= Kinetic energy of hand

⇒ $mc\Delta T= n\frac{1}{2}m_hv_h^2$

m_h= mass of the hand = 0.4 kg

v_h= velocity of the hand = 10 m/s

n= number of slaps

c= 4180 J/Kg °C

m= mass of chicken = 1 kg

Assuming all the energy of hand goes into chicken

Given Ti=0°C and T_f= 170 F= 76.66°C

Now putting the values in above equation to get n

$1\times4180(76.66)= n\frac{1}{2}0.4\times10^2$

n= 16021.03 slaps

8 0

3 years ago

Which argument best explains the charge of an atomic nucleus? *

astraxan [27]

Answer:

An atomic nucleus is positively charged because it is composed of protons

Explanation:

Protons carry positive charge and nucleus only contain protons

6 0

3 years ago

Why is gymnastics often considered to be the purest of all sports or athletic activities

Pachacha [2.7K]

To my knowledge, it isn't.

But I can provide reasons to defend this statement, including how gymnastics provides many benefits to our physical and mental health. It aids us in flexibility, coordination, discipline, and more. It keeps us socially healthy and capable with teams, friends, and competitions.

4 0

3 years ago

Read 2 more answers

Is the distance traveled during a specific unit of

Anton [14]

Answer:

velocity

Explanation:

I think i dont really know

4 0

3 years ago