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Alja [10]
3 years ago
7

Define potentiol energy , kenetic energy.​

Physics
2 answers:
Pani-rosa [81]3 years ago
8 0

Potential energy is stored energy. For example, if a bowling ball is on top of a giant hill, we say it has potential energy because it has the potential to do work which is to roll down the hill.

Kinetic energy is the energy of movement so once that ball rolls down that hill, that potential energy is converted to kinetic energy.

Novosadov [1.4K]3 years ago
3 0

Hey there!

Potential energy and kinetic energy are the two main groups of energy when it comes to all of that. Potential energy is stored energy. Kinetic energy is the energy that is released.

For example, potential energy is when you hold a ball higher than the ground,  and kinetic energy is when you release the ball.

Hope this helps! Have a great day! :)

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A batter hits a ball at 35 degrees above the horizontal and it is caught 4 seconds later 100 meters from home plate. What is the
Mamont248 [21]

Answer:

u=(26.5 i + 18.5j) m/s

Explanation:

The range of a projectile is given by the formula

d=\frac{u^2}{g} sin 2\theta

where in this case, we have

d = 100 m is the range

u is the initial speed (the magnitude of the initial velocity)

g = 9.8 m/s^2 is the acceleration of gravity

\theta = 35^{\circ} is the angle of projection

Solving for u, we find:

u=\sqrt{\frac{dg}{sin 2\theta}}=\sqrt{\frac{(100)(9.8)}{sin(2\cdot 35^{\circ})}}=32.3 m/s

Now we can easily find the components of the initial velocity:

u_x = u cos \theta = (32.3)(cos 35^{\circ})=26.5 m/s\\u_y = u sin \theta = (32.3)(sin 35^{\circ})=18.5 m/s

So, the initial velocity of the ball is

u=(26.5 i + 18.5  j) m/s

where i and j are the unit vector indicating the horizontal and vertical direction.

7 0
3 years ago
Many radioisotopes have important industrial, medical, and research applications. One such radioisotope is 60Co, which has a hal
olga2289 [7]
You are given the half life of an isoptope which is 5.2yr and the numer of days that it will decay which is 30 months. You are required to find the initial mass of the isotope.

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7 0
3 years ago
A rock has a mass of 14,826 grams. what is the rocks mass in kilograms
Mademuasel [1]

Answer:

14.826 kg

Explanation:

move the decimal at the end over to the left 3 times

7 0
3 years ago
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Find the equivalent resistance, the current supplied by the battery and the current through each resistor when the specified res
egoroff_w [7]

Answer with Explanation:

We are given that

Potential difference =2V

a.R_1=10 ohm,R_2=9 ohm

We know that in series

R_{eq}=R_1+R_2

R_{eq}=10+9=19 ohm

I=\frac{V}{R}

I=\frac{2}{19}=0.105 A

V_1=IR_1

V_1=\frac{2}{19}\times 10=1.05 V

V_2=\frac{2}{19}\times 9=0.95 V

b.R_1=10 ohm , R_2=9 ohm ,R_3=3 ohm

R_{eq}=10+9+3=22\Omega

R_{eq}=22\Omega

I=\frac{2}{22}=\frac{1}{11}=0.09 A

V_1=10(0.09)=0.9 V

V_2=9(0.09)=0.81 V

V_3=3(0.09)=0.27 V

4 0
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A cash crop is a crop intended for _____.
valkas [14]

Explanation:

for commercial use.

It is usually sold.

4 0
3 years ago
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