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Tems11 [23]
3 years ago
7

What is the difference between potential and kinetic energy? *

Physics
2 answers:
Irina18 [472]3 years ago
7 0
B ..;.;..:.;/;;/;/(-(/;/;;;.
notsponge [240]3 years ago
6 0

Answer:

B

Explanation:

Potential energy is stored energy based on the position of an object.

Kinetic Energy is energy throughout motion.

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What does doubling the voltage do to the strength of the electromagnet?
dimulka [17.4K]

Answer:

Stronger

Explanation:

5 0
3 years ago
When catching a baseball, the ball applies a force of 39.6 N to a  catcher's glove.  If the work done on the catchers glove is 4
cricket20 [7]

Answer:

d = 1.19 m

Explanation:

Given that,

The force applied by the ball, F = 39.6 N

The work done on the catchers glove is 47.5 J

We need to find the distance traveled by the ball. We know that,

Work done, W = Fd

Where

d is the distance traveled

d=\dfrac{W}{F}\\\\d=\dfrac{47.5 }{39.6 }\\\\d=1.19\ m

So, it will cover 1.19 m.

4 0
3 years ago
A rolling ball with a mass of 1.01 kg crashes into a wall. The wall exerts a force of 2.40 Newtons and stops the ball. What was
klemol [59]

Answer:

Acceleration, a = 2.38m/s²

Explanation:

Given the following data;

Mass = 1.01 kg

Force = 2.4N

To find the acceleration;

Force is given by the multiplication of mass and acceleration.

Mathematically, Force is;

F = ma

Where;

  • F represents force.
  • m represents the mass of an object.
  • a represents acceleration.

Making acceleration (a) the subject, we have;

Acceleration, a = \frac{F}{m}

Substituting into the equation, we have;

Acceleration, a = \frac{2.4}{1.01}

<em>Acceleration, a = 2.38m/s²</em>

<em>Therefore, the magnitude of the acceleration of the ball at the time of the crash is 2.38 meters per seconds square. </em>

3 0
3 years ago
A wave has a wavelength of 2.30 m and a frequency of 370.0 Hz. What is the speed of the wave?
son4ous [18]

Given data:

Wave length (λ) = 2.30 m,

Frequency     (f) = 370 Hz (waves/sec),

Determine the speed of the wave = ?

Speed of the wave is defined as "the distance a wave travels in a given time". And it is a product of <em>wavelength (λ) </em>and <em>frequency(f). </em>

An Important point to be remember here is <em>"when increasing the wave length of the wave does not increase the speed of the wave"</em> because the wave speed also depends on frequency (f), So, if the wave length increases wave speed decreases. As a result the product of wave length and frequency are same.

Mathematically,

          Wave speed = wave length × frequency

                                = 2.30 m × 370 waves/sec.

                                = 851 m/s.

<em>Speed of the wave is 851 m/s</em>

6 0
3 years ago
Read 2 more answers
9. The Metro Rail makes a stop at NRG Stadium to pick up some Texans fans after the game. After
attashe74 [19]

Answer:

It takes the train 7.5 seconds to reach top speed

The train travels 112.5 meters before it reaches its top speed

Explanation:

The Metro Rail makes a stop at NRG Stadium to pick up some Texans

fans after the game

After  all the passengers board, the train accelerates at a rate of 4 m/s²

to a top speed of 30 m/s

We need to find the train takes how many seconds to reach the

top speed

Given is:

→ The train start from rest, then its initial speed u = 0

→ It acceleration a = 4 m/s²

→ Its top speed v = 30 m/s

To find the time we can use this rule;

→ t=\frac{v-u}{a}

→ t=\frac{30-0}{4}=\frac{30}{4}=7.5 seconds

<em>It takes the train 7.5 seconds to reach top speed</em>

<em></em>

Now we need to find how far the train travels before reaches top speed

We can use this rule;

→ v² = u² + 2as, where s is the distance

→ v = 30 m/s , u = 0 , a = 4 m/s²

Substitute these values in the rule

→ (30)² = 0 + 2(4) s

→ 900 = 8 s

Divide both sides by 8

→ s = 112.5 m

<em>The train travels 112.5 meters before it reaches its top speed </em>

7 0
3 years ago
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