C.) Year
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Answer: h = 20.92 m
Explanation: By using the law of conservation of energy, the kinetic energy of the ball equals it potential energy.
Kinetic energy =mv^2/2
Potential energy = mgh
Where m = mass of the object, v = velocity of object = 23.5 m/s
g = acceleration due gravity = 9.8 m/s^2
mv^2/2 = mgh
m cancels out each other on both sides , hence we have that
v^2 = 2gh.
We want the ball to move towards the wall (horizontal motion), hence we need the horizontal component of the velocity since the velocity is inclined at an angle of 30.5 to the ground (horizontal).
Hence v = 23.5 × cos 30.5, v = 20.248 m/s
Recall that v^2 = 2gh
(20.248)^2 = 2×9.8×h
409.98 = 19.6 h
h = 409.98/ 19.6
h = 20.92 m
Area of triangle, ECD
Area, A= 60 square inches
Base, b= 12in
Height, h=?
Note that Area of a triangle = 1/2×b×h
Substitute the values: 60 = 1/2×12×h
60 = 6h
h = 10in
The height is 10in.
Coincidentally, the height of the triangle is also the side of the square.
So side of square, L = 10in
Area of a square = L^2 or Side × Side
Area = 10 × 10
Area = 100 square inches.
The area of the trapezoid = area of square + area of triangle
The are of trapezoid = 100 + 60 inches squared = 160inches squared.
B) The wall pulls with a force of 250 N against the force
Explanation:
We can answer this question by using Newton's third law of motion, which states that:
<em>"When an object A exerts a force (called action) on an object B, then object B exerts an equal and opposite force (called reaction) on object A"</em>
In this situation, the student is applying a force of 250 N on the wall. We can identify this force as the action. Therefore, this means (according to Newton's third law) that the wall will also apply a force (the reaction) of equal magnitude (so, 250 N), in the opposite direction to the original force.
Therefore, the correct statement is
B) The wall pulls with a force of 250 N against the force
Learn more about Newton's third law:
brainly.com/question/11411375
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Answer:
Below
Explanation:
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1. Lean meat such as chicken or fish
Advantages : they are high quality sources of protein, and contain all 8 essential amino acids, which is why they are considered a complete protein
2. Animal products like eggs and greek yogurt
Advantages : these foods also contain all 8 essential amino acids, making them a complete protein
3. Pulses like beans and lentils
Advantages : tends to be lower in calories and fat than animal-based protein sources, as well as being higher in fiber and essential nutrients
Hope this helps!
