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ra1l [238]
3 years ago
14

1 Which statement BEST describes how a golf club does "work" on a golf ball? (A) When the club hits the ball the club transfers

all of its kinetic energy to the ball. (B) All of the kinetic energy from the club is transferred to the ball as they both move through the air. (C) Some of the kinetic energy from the golf club is transferred to the ball and some transforms into sound and heat, but the total energy remains the same. (D) The golf club loses kinetic energy when it hits the ball and the ball gains kinetic energy from the air as it travels.
Physics
1 answer:
artcher [175]3 years ago
7 0

Answer:

(C) Some of the kinetic energy from the golf club is transferred to the ball and some transforms into sound and heat, but the total energy remains the same.

Explanation:

According to the law of conservation of energy, the total energy of a closed system is constant.

In this problem, the main type of energy involved is the kinetic energy.

Kinetic energy is the energy possessed by an object due to its motion; mathematically, it is calculated as

K=\frac{1}{2}mv^2

where

m is the mass of the object

v is its speed

In this problem, at the beginning, the golf club is moving, therefore it has kinetic energy.

Then, the club hits the ball, which is put in motion: therefore, the ball has acquired kinetic energy as well. This energy has been transferred from the golf club, which has therefore lost part of its energy.

At the same time, sound and heat are produced in the collision between the golf club and the ball. Since the total energy must be conserved, this means that the initial kinetic energy of the golf club must be equal to the sum of ball's kinetic energy + sound energy + heat energy released in the collision.

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What are 5 differences between Spring Tides and Neap Tides?
ad-work [718]

Spring Tides are formed by the constructive interference of bulges created by the moon and sun. Spring Tides occur when the Sun, Moon and the Earth are aligned. Neap Tides are formed by the destructive interference created by the moon and sun. Neap tides occur when the Sun, Moon, and Earth align to make a right angle.
4 0
3 years ago
If you were thinking about a washing machine as a system which of the following represents the inputs?
Lostsunrise [7]

Answer:

The answer is a, the dirty cloths, water and detergent.

Explanation:

The answer is the above selected because the inputs basically represent the data that are passed through the system to generate the output.

In this case, the inputs are the aforementioned in the answer while the possible output would literally be the clean cloths.

4 0
3 years ago
A 10,000-watt radio station transmits at 535 kHz. Determine the number of joules transmitted per second. 10,000 J/s 10 J/s 535 J
REY [17]
1 nanowatt  =  1 nanojoule/sec
1 watt  =  1 joule/sec
10 watts  =  10 joules/sec
100 watts  =  100 joules/sec
742.914 watts  =  742.914 joules/sec
1,000 watts  =  1,000 joules/sec
10,000 watts  =  10,000 joules/sec
100,000 watts  =  100,000 joules/sec
1 megawatt  =  1 megajoule/sec
1 gigawatt  =  1 gigajoule/sec
1 petawatt  =  1 petajoule/sec

We don't care what frequency the transmission is using,
or who their morning DJ is.

5 0
3 years ago
What is the first law of conservation of energy? How is the law applicable to the earths energy balance
Vlad1618 [11]

Answer:

First law of thermodynamic state that energy is always conserved, in other word, energy cannot be created or destroyed.

This means that energy can only transfer from one source to another.

For example, the electricity we used to power our phone didn't come from nowhere.

We charge our phone using the energy from the electricity from the outlet.

The outlet gets its energy from the power plant, who generated that energy from burning coal.

The coal they burned got their energy while they were alive as plants.

The plants got their energy from the sun.

The sun got its energy from other cosmic stuff and so on...

My point is that the energy we use will always cycle around. It doesn't come from thin air and it doesn't disappear into thin air either. This help keeps things balance because if energy is created out of thin air then the earth might just blow up. If energy gets erased into thin air then there'll be nothing to fuel life.

5 0
3 years ago
Jeff of the Jungle swings on a 7.6-m vine that initially makes an angle of 32 ∘ with the vertical.
shtirl [24]

To solve this problem we will use the trigonometric concepts to find the distance h, which will allow us to find the speed of Jeff and that will finally be the variable that will indicate the total tension, since it is the variable of the centrifugal Force given in the vine at the lowest poing of the swing.

From the image:

cos (32) = \frac{(7.6-h)}{7.6}

h = 1.1548m

When Jeff reaches his lowest point his potential energy is converted to kinetic energy

PE = KE

mgh = \frac{1}{2} mv^2

v = \sqrt{2gh}

v = \sqrt{2(9.8)(1.1548)}

v= 4.75m/s

Tension in the string at the lowest point is sum of weight of Jeff and the his centripetal force

T = W+F_c

T = mg + \frac{mv^2}{r}

T = (83)(9.8)+\frac{(9.8)( 4.75)^2}{7.6}

T = 842.49N

Therefore the tension in the vine at the lowest point of the swing is 842.49N

3 0
3 years ago
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