Answer:
Explanation:
3.4 = 18.87x + 23.97
collecting like terms
3.4 - 23.97 = 18.87x
-20.57 = 18.87x
dividing both sides by 18.87
x = -20.57/18.87
x= -1.09
Answer: N = Mgcos(theta)
Therefore, the Normal reaction force is equal to Mgcos(theta)
Explanation:
See attached for a sketch.
From the attachment.
.
N = normal reaction force on block
W = weight of the block
theta = angle of the inclined plane to the horizontal
From the sketch, we can see that
N is equal in magnitude but opposite direction to Wy
N = Wy
And
Wy = Wcos(theta)
Wx = Wsin(theta)
Then,
N = Wy = Wcos(theta)
But W = mass × acceleration due to gravity = mg
N = Mgcos(theta)
Therefore, the Normal reaction force is equal to Mgcos(theta)
It is <span>C. Low to moderate level of exertion can be sustained over long periods of time </span>
When object is moving in circular path then if suddenly its force reduced to zero then it will move to straight line
This is defined by Newton's First Law
So as per first law of Newton we can say
When there is no net force on an object then it will continue its state of motion in its original state without any change in it.
This is also known as law of inertia
so correct answer will be
Newton's 1st law
2 they are easy to compress,
2 they expand to fill their containers,
3 they occupy far more space than the liquids or solids from which they form.
hope this helped!
