(a) 1800 N
The equation of the forces along the vertical direction is:

where
is the component of the applied force along the vertical direction
N is the normal force on the sled
mg is the weight of the sled
Substituting:
F = 1210 N
m = 246 kg

We find N:

(b) 0.580
The equation of the forces along the horizontal direction is:

where
is the horizontal component of the push applied by the mule
is the static frictional force
Substituting:
F = 1210 N
N = 1800 N

We find
, the coefficient of static friction:

(c) 522 N
In this case, the force exerted by the mule is

So now the equation of the forces along the horizontal direction can be written as

where

and
is the new frictional force, which is different from part (b) (because the value of the force of friction ranges from zero to the maximum value
, depending on how much force is applied in the opposite direction)
Solving the equation,

Answer is b that is Heat energy from below the ground converts water to steam to drive a steam turbine attached to an electrical generator.. .
Answer:
These forces are all equal and cancel each other out. Gravity pushes downward on the ice cream. This can also be called the weight of the ice cream. Buoyant force pushes the ice cream upward
The Joule is the SI unit of energy.
Answer:
Rifle Momentum=7.77kg*m/s v'= 1.554 m/s
Explanation:
a) m1v1 + m2v2 = m1v1' + m2v2'
0+0 = 0.03*259 + P(rifle momentum)
solve for P
p= 7.77kg*m/s
b) 7.77= 5*v'
v'= 1.554 m/s