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2 years ago

What is the relationship between force, velocity, and mass?

Physics

2 answers:

marysya [2.9K]2 years ago

3 0

Answer:

The slower the intended velocity, the closer the force expressed comes to equalling the linear inertia of the load (i.e. the amount of force needed to hold the weight motionless). From Equation 1, force is inversely proportional to time

lisabon 2012 [21]2 years ago

3 0

Answer:

It states that the time rate of change of the velocity

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The kinetic energy of a baseball that with a mass of 0.140kg is 7 J. What is the baseballs velocity?

Nuetrik [128]

Answer:

10 m/s

Explanation:

Kinetic energy= $\frac{1}{2}$ mv² where m is mass and v is velocity.

We have to make v the subject so we should rearrange the equation

K= $\frac{1}{2}$ mv²

v²= $\frac{K}{0.5*m}$ (use algebra)

v²= 7/0.5×0.140

v²=100

v=√100

v=10 m/s

We can confirm this by using the kinetic energy formula.

K= $\frac{1}{2}$ ×0.140×10²

K= 7 J

Hence it is proved that velocity is 10 m/s

3 0

1 year ago

How much kinetic energy a 498 kg motorcycle has when it is moving at 5.7 m/s

mel-nik [20]

Answer:

8090.01 J

Explanation:

The formula for kinetic energy is $KE = \frac{1}{2}mv^{2}$ . We are given the mass and velocity, so plug what is given into the equation. $KE = \frac{1}{2}(498)(5.7^{2}) = 8090.01 \ J$

8 0

2 years ago

When a 72 W light bulb is connected to a 298 V source, what is the current ?

Norma-Jean [14]

the current is 0.24 Amperes

Explanation

power is the amount of energy transferred or converted per unit time, it can be found using the formula

$\begin{gathered} P=I*V \\ where\text{ P is the power} \\ I\text{ is the current} \\ V\text{ is the voltage} \end{gathered}$

Step 1

a)let

$\begin{gathered} P=\text{ 72 Watts} \\ V=298\text{ V} \end{gathered}$

b) now, replace in the formula and solve for I

$\begin{gathered} P=I*V \\ 72\text{ W=I*298 V} \\ divide\text{ both sides by 298 V} \\ \frac{72W}{298\text{ V}}\text{=}\frac{I*298V}{298\text{ V}} \\ 0.24\text{ Amperes=I} \end{gathered}$

therefore,the current is 0.24 Amperes

I hope this helps you

6 0

1 year ago

The Doppler effect using ultrasonic waves of frequency 2.25 × 106 Hz is used to monitor the heartbeat of a fetus. A (maximum) be

miss Akunina [59]

Answer:

$v = 2.88 \times 10^7 m/s$

Explanation:

As per Doppler's effect we know that the frequency of the sound that is observed by the detector is the reflected sound

This reflected sound is given as

$f' = f (\frac{v - v_h}{v + v_h})$

$f' = 2.25\times 10^6(\frac{v - 1540}{v + 1540})$

so we know that the beat frequency is

$\Delta f = 240 Hz$

so we will have

$f - f' = \Delta f$

$2.25 \times 10^6 - 2.25\times 10^6(\frac{v - 1540}{v + 1540}) = 240$

$1 - (\frac{v - 1540}{v + 1540}) = 1.07 \times 10^{-4}$

so we have

$0.99989 = (\frac{v - 1540}{v + 1540})$

$1.99989\times 1540 = 1.067 \times 10^{-4} v$

$v = 2.88 \times 10^7 m/s$

4 0

3 years ago

We know the role of the Sun in our solar system and its importance to life on Earth. What would have happened if the Sun were bi

Alex

With that said, we ALL SHOULD KNOW that life on Earth is dependent on the light and heat that it receives from the Sun. If the Sun's mass abruptly halved, it would certainly have a huge impact on these key points; it would grow cooler and redder and eventually transform into a red dwarf.

d If for any reason the Sun shrank smaller than the Earth at least, then this shrunken Sun wouldn't have the mass to create fusion and would burn out completely. Our solar system would lose its only star. ... Earth's mass would be at least 333,000 times bigger than it is now. Imagine the gravity that the planet would have. I think from what i read and learned a bit more of the SUn.!

3 0

2 years ago