Answer:
The force needed to push a block of ice is 100 N.
Explanation:
It is given that,
Length of the friction less plane, l = 6 m
Height of the wall, h = 2 m
Weight of the block of ice, W = 300 N
The length of the inclined plane and the height of the wall act as hypotenuse and the perpendicular of the right angled triangle. Using trigonometry to find the angle as :
Force needed to push a block of ice weighing 300 N up the plane is equal to the horizontal component of the force as :
So, the force needed to push a block of ice is 100 N. Hence, this is the required solution.
Answer:
<h3>D. A coal burning power plant</h3><h3 />
Explanation:
it is a coal power plant , nuclear power is economical and does not fluctuate as much as wind or solar power.
Unlike coal, it is considered clean in terms of the amount of greenhouse gas emissions produced by the power plant itself, although uranium mining and processing are not without risks and environmental impact
Let x be the time it takes for the trip to be completed given that the speed is y.
When the time is 30 minutes (equal to 0.5 hour) shorter than x, the speed is 8 mph more than the original speed.
The equations that would best represent the given conditions are:
(1) 120 = (x)(y)
(2) 120 = (x - 0.5)(y + 8)
Simplifying,
y = 120/x
Substitute:
120 = (x - 0.5)(120/x + 8)
The value of x from the equation is 3. Thus, if I go with the usual speed, the time it will take me to finish the trip is approximately 3 hours.
Answer:
This refers when a spiker quickly strides towards the net before they jump in the air for an attack.
