Explanation:
Gravity
Gravity is one major force that creates tides. In 1687, Sir Isaac Newton explained that ocean tides result from the gravitational attraction of the sun and moon on the oceans of the earth (Sumich, J.L., 1996).
Answer:
Explanation:
Work is given by the equation 
where 
is force and 
is displacement.
Displacement is defined as change in position. In this case, the box moves from 5m to 20m. Its displacement is 
.
The force acting on the box is the force of gravity, given as 
.
Therefore, the total work done is:
(two significant figures).
Answer:
Explanation:
Let m be the mass of cylinder and r be the radius. It is moving with velocity v and angular velocity is ω. Let I be the moment of inertia of the cylinder.
I = 0.5 mr²
Total kinetic energy, T = 0.5 mv² + 0.5 Iω²
T = 0.5 (mv² + 0.5 mr²ω²)
v = rω
So, T = 0.5 (mv² + 0.5 mv²) = 0.75 mv²
Rotational kinetic energy is
R = 0.5 Iω² = 0.5 x 0.5 mr²ω²
R = 0.25 mv²
So, R / T = 0.25 / 0.75 = 1/3
Total force = Frope - mg = 309-300
total force = ma
9 = 30a
Answer:
pascal
Explanation:
its obtained after either division or multiplication
