Answer:
dog sleding ----> they do the work
Explanation:
Answer:
Height of ramp = 17.49 m
Explanation:
We have equation of motion ,
, s is the displacement, u is the initial velocity, a is the acceleration and t is the time.
Considering horizontal motion of skier
Initial velocity = 33 m/s, Displacement = 63 m, acceleration = 0 and we need to find time taken to reach ground by the skier.
![63= 33t+\frac{1}{2} *0*t^2\\ \\ t=1.909seconds](https://tex.z-dn.net/?f=63%3D%2033t%2B%5Cfrac%7B1%7D%7B2%7D%20%2A0%2At%5E2%5C%5C%20%5C%5C%20t%3D1.909seconds)
The vertical distance traveled in 1.909 seconds is the height of ramp
Initial velocity = 0 m/s, acceleration = acceleration due to gravity = 9.8
, time = 1.909 s and we need to find displacement.
![s= 0*1.909+\frac{1}{2} *9.8*1.909^2\\ \\ s=17.49 m](https://tex.z-dn.net/?f=s%3D%200%2A1.909%2B%5Cfrac%7B1%7D%7B2%7D%20%2A9.8%2A1.909%5E2%5C%5C%20%5C%5C%20s%3D17.49%20m)
So height of ramp = 17.49 m
Answer:
The power of the kettle is P = 1 watt.
Explanation:
The definition of power is:
Power equals the quotient between work and time, or:
P = w/t.
In this case, we know that the work is:
w = 1J
And the time is:
t = 1 s
Then the power will be:
P = 1J/1s = 1 J/s
Also knowing that:
1 J/s = 1 W
(w is the unit for Watt)
We can conclude that the power of the kettle is:
P = 1 W
The outer shell can hold 1 electron
Answer:
With air resistance, acceleration throughout a fall gets less than gravity (g) because air resistance affects the movement of the falling object by slowing it down. How much it slows the object down depends on the surface area of the object and its speed
Explanation:
PLZ MARK AS THE BRAINLIEST
HAVE A GOOD DAY
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