A place kicker must kick a football from a point 36.0 m from the uprights. As a result of the kick, the ball must clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the ground with an initial speed of 20 m/s at an angle of 53° to the horizontal. By how much does the ball clear or fall short of clearing the crossbar?
Answers
Final answer:
By utilizing principles of projectile motion, it is found that the football clears the crossbar by approximately 10.75 meters.
Explanation:
To determine by how much the ball clears or falls short of clearing the crossbar, we need to use the physics principles of projectile motion. The maximum height 'h' of the football can be given by equation of motion: h = (v²sin²θ) / (2g), where 'v' is the initial velocity, 'g' is the acceleration due to gravity and 'θ' is the angle of projection.
Substituting the given values: h = [(20)²sin²53°] / (2*9.8) ≈ 13.8 m above the ground when it was kicked. However, the football was kicked from ground level, so we need to subtract the height of the crossbar from this value, which is 3.05 m. Thus, the ball clears the crossbar by approximately: 13.8 - 3.05 = 10.75 m.
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the acceleration would be>
F=ma
->F/m= a
->12/2= a
->6 = a
therefore acceleration is 6 ms^-2
Answers
Answer:
7.62 x J
Explanation:
Given:
frequency 'f'= 1.15 x Hz
Planck's constant 'h'= 6.63x Js
Energy of photon can be calculated by the formula:
E= hf
Where,
E= energy of photon
f= frequency of photon
h= Planck's constant
Putting the given values in the formula
E= 6.63x x 1.15 x
E= 7.62 x J
Therefore, the energy of photon is 7.62 x J
Answer:
Explanation:
Given:
Frequency, f = 1.15 × 10^15 Hz
Plancks constant, h = 6.63 × 10^-34 Js
Using the formula,
Energy, E = h × f
Inputting values,
Energy, E = 1.15 × 10^15 × 6.63 × 10^-34
= 7.6245 × 10^-19 J
Energy of the photon , E = 7.6245 × 10^-19 J.
B. momentum.
C. net force.
D. weight.
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The product of an object’s mass and velocity is its momentum. Therefore, option B is correct.
What do you mean by the momentum ?
The sum of a particle's mass and velocity is called momentum. As a vector quantity, momentum possesses both magnitude and direction. According to Isaac Newton's second equation of motion, the force applied on a particle is equal to the time rate of change of momentum.
The link between an object's mass, velocity, and direction is provided by momentum. Force is the outcome of any change in momentum. Therefore, the force acting on the object is determined using a change in momentum.
The momentum is the quantity of motion. As an object has momentum if it is moving and has mass, quantity may be measured in this situation. An object lacks momentum if it is immobile.
Thus, option B is correct.
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♡♡Hope I helped!!! :)♡♡
Answers
From among the choices provided, the more appropriate
answer is ' T ', the initial letter often used to represent
words that include 'true', 'truth', 'trust', etc., (as well as
'tree', 'train', 'transmit', 'Transylvania', 'trachea', 'travesty',
and 'trick', which are irrelevant to the present discussion).
This response is the most fitting and appropriate, because
the statement that precedes the list of allowable choices is
exemplary in its accuracy and veracity. An ion can, in fact,
have a positive or negative charge, although the same ion
cannot have both.
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some other forces on the object that cancel out the first one.
Are you looking for the answer ... an "UNBALANCED" force ?
That's a very poor way to describe it, because there's no such thing
as a balanced or unbalanced force. The thing that's balanced or
unbalanced is a GROUP of forces, not a single force.
Answers
1 m = 100 cm
So, to convert from m/s² to cm/s², you need to square this factor because acceleration is in units of length per time squared:
(1 m/s²) = (100 cm/s²)
Therefore, 1 m/s² is equal to 100 cm/s².