Answer:
3.1 m/s
Explanation:
The total distance she has to run is the addition of the three lengths:
47 + 63 + 76 = 186 meters.
She needs to cover it one minute (60 seconds). Therefore her speed must be:
186 m / 60 s = 3.1 m/s
Answer:
= 351.84 J
Explanation:
Using the conservation of energy K:

so:

where m is the mass, v the initial velocity,
is the kinetic energy of the mass as it clears the fence, g the gravity and h the altitude.
Then, replacing values, we get:

solving for
:
= 351.84 J
Answer:
A boiler is a type of coal fired power plant.
Explanation: