Answer:
force need to push it up is 7848 N
Explanation:
given data
mass m = 20000 kg
height h = 0.800 m
length L = 20 m
to find out
how much uphill force
solution
we use here work done = potential energy
because here work is gravitational potential
so
work done = F × L
so
F × L = mgh
and
F = mgh / L
put here value
F = 20000(9.81) 0.800 / 20
F = 7848
so force need to push it up is 7848 N
Answer:
7848 N
Explanation:
Recall: K.E = P.E = Fd
K.E = [tex]\frac{1}{2} mv^{2}[/tex]
P.E = mgh
Given parameters;
mass (m) = 20000 kg
height (h) = 0.8 m
distance (d) = 20 m
g is given as 9.81 [tex]ms^{-2}[/tex]
Force (F) = ?
Comparing the above parameters with the equations to find F,
We will use P.E = Fd
i.e. mgh = Fd
making F the subject of the formula
F = [tex]\frac{mgh}{d}[/tex]
substitute for m, g, h and d
F = [tex]\frac{20000 X 9.81 X 0.8}{20} = 7848N[/tex]
