Answer:
D. 4 m
Explanation:
According to the work-energy theorem, the work done by the force acting on a body modifies its kinetic energy.
The car comes to rest after a given distance, so . Recall the definition of work , here F is the constant force acting on the car, d is its traveled distance and is the angle between the force and the displacement, since friction force acts opposite to the direction of motion :
We have:
Thus:
Given :
A 0.50-kg mass is attached to a spring of spring constant 20 N/m along a horizontal, frictionless surface.
The object oscillates in simple harmonic motion and has a speed of 1.5 m/s at the equilibrium position.
To Find :
At what location are the kinetic energy and the potential energy the same.
Solution :
Let, at location x from the equilibrium position the kinetic energy and the potential energy the same.
So,
Hence, this is the required solution.
Answer:
Explanation:
The missing question her is: What is the change in momentum of the baseball?
According to the Impulse-Momentum Theorem, we have:
Where:
is the exerted force
is the time interval
is the change in momentum
So, in the case of the bat and the ball we have:
For the bat:
(1)
For the ball:
(2)
Since is the same for both the bat and the ball, their impulses are equal in magnitude but in opposite direction according to Newton's 3rd law of motion. Hence:
(3)
Then:
(4)
Where:
Being , ,
Being
Then (4) is rewritten as:
(5)
Since :
(6)
Isolating :
(7)
(8)
(9)
Now, the change in momentum of the baseball is:
(10)
Substituting (9) in (10):
(11)
Finally:
This is the change in momentum of the baseball. Note it is negative because its initial velocity is greater than its final velocity
Answer:
Spectrophotometry is the quantitative measurement of light spectra reflection and transmission properties of materials as function of the wavelength. Photometry measures the total brightness as seen by the human eye
Explanation:
Please give me brainliest
1250kgm²/s is the motional kinetic energy of a 25kg object moving at a speed of 10m/s
Kinetic energy of an object is defined as the energy which is possessed when that is in motion. It is the energy of the kinetic mass of an object. Kinetic energy is never negative and is a scalar quantity. That is, it shows only size, not orientation.
Given to us
Mass of the object, m=25kg
Velocity of the object, v=10m/s
K.E=1/2x25x10²
=1250
Kinetic energy is directly proportional to the mass and velocity squared (K.E.) of an object. =1/2xMxV². If the mass is in kilograms and the velocity is in meters/second, then the kinetic energy is in kilograms - meters squared/second.
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