a 1.0 kg ball is thrown into the air with an initial velocity of 30 m/s. How much kinetic energy does the ball have?
Answers
KE=.5(1)(30^2)
KE=(.5)(900)
KE=450
Assuming no air resistance....
Final answer:
The kinetic energy of a 1.0 kg ball thrown with an initial velocity of 30 m/s is calculated using the formula KE = 1/2 mv^2, resulting in an energy of 450 Joules.
Explanation:
The question you've asked pertains to calculating the kinetic energy of a ball thrown into the air. To find the kinetic energy (KE) of a 1.0 kg ball thrown with an initial velocity of 30 m/s, you can use the formula KE = ½ mv², where m is the mass of the ball and v is the velocity. Plugging in the values, you get KE = ½ × 1.0 kg × (30 m/s)² = 0.5 × 1.0 × 900 = 450 J. Therefore, the kinetic energy of the ball is 450 Joules.
Learn more about kinetic energy here:
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Answers
Answer:
As per faraday's law the rate of change in magnetic flux linked with a coil will induce EMF in the coil. It is given by
now here as we are closing the switch and then open it alternatively so it will change the value of current in the coil.
This change in current will change the magnetic flux in the coil due to which it will induce EMF in it.
Now by Lenz the the direction of induce current in the coil will always opposite to the causes due to which it is induced.
As we know that when switch is connected to flow the current the direction of induced current is in opposite to the current so that it will oppose the increasing value of current while when we open the switch the induced current is in direction of the current so that it will increase the value of decreasing current in the loop.
The induced emf is in the direction opposite to the direction of current.
What is induced emf?
Emf is the production of a potential difference in a coil as a result of changes in the magnetic flux passing through it.
When the flux coupling with a conductor or coil changes, electromotive Force, or EMF, is said to be induced.
The rate of change in magnetic flux linked to a coil will induce EMF in the coil, according to Faraday's law.
Now, when we alternately close and open the switch, the current in the coil will change.The magnetic flux in the coil will vary as a result of the change in current, resulting in EMF in the coil.
Now, according to Lenz, the direction of induce current in the coil will always be the polar opposite of the causes.
Hence the induced emf is in the direction opposite to the direction of current.
To learn more about the induced emf, refer to the link;
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Answers
Examples of the period, frequency, speed of a wave in a sentence?
Examples
•He indicated the space behind him with a wave of a hand.
•On land only the grass and trees wave, but the water itself is rippled by the wind.
•But wherever it may turn there always will be the wave anticipating its movement.
•Harbor was completely submerged by the great wave, which still came
Answers
chemical energy stored in the wood, was released in the form of heat and light when the
chemical compounds got hot enough.
B) 880 amps
C) 8.3 amps
D) 0.120 amps
Answers
Answer : I = 8.33 A
Explanation :
It is given that,
Power rating of the toaster, P = 1000 watts
Household voltage, V = 120 volts
We know the relation between power, voltage and the current is :
8.33 A of current runs through the toaster.
Hence, this is the required solution.
I don't know what equation to use?
Answers
Impulse = (force) x (length of time the force lasts)
I see where you doodled (60)(40) over on the side, and you'll be delighted
to know that you're on the right track !
Here's the mind-blower, which I'll bet you never thought of:
On a force-time graph, impulse (also change in momentum)
is just the area that's added under the graph during some time !
From zero to 60, the impulse is just the area of that right triangle
under the graph. The base of the triangle is 60 seconds. The
height of the triangle is 40N . The area of the triangle is not
the whole (base x height), but only 1/2 (base x height).
1/2 (base x height) = 1/2 (60s x 40N) = 1,200 newton-seconds
That's the impulse during the first 60 seconds. It's also the change in
the car's momentum during the first 60 seconds.
Momentum = (mass) x (speed)
If the car wasn't moving at all when the graph began, then its momentum is 1,200 newton-sec after 60 seconds. Through the convenience of the SI system of units, 1,200 newton-sec is exactly the same thing as 1,200 kg-m/s . The car's mass is 3 kg, so after 60 sec, you can write
Momentum = M x V = (3 kg) x (speed) = 1,200 kg-m/s
and the car's speed falls right out of that.
From 60to 120 sec, the change in momentum is the added area of that
extra right triangle on top ... it's 60sec wide and only 20N high. Calculate
its area, that's the additional impulse in the 2nd minute, which is also the
increase in momentum, and that'll give you the change in speed.
Answers
Answer:
10N each
Explanation:
Doing a little math here to make it balanced. 10+10=20 therefore you have the same on both sides.
Hope this helps!