here we can say that net force on the student vertically upwards will be counter balance by his weight downwards
Let net force F is exerted by each hand
so here we will have
so the force exerted by each hand will be 414.1 N
Upper mantle
The theory of the plate tectonics uses the convection cells in the upper mantle layer as the foundation for the movement of the continents.
To put it simple the process is explained like the convection cells create a lot of pressure, that pressure, supported by the high temperatures and magma, influence the crust above, and manage to crack it on certain places. As the crust cracks, it becomes a separate entity, and under the enormous force from bellow it slowly moves into a particular direction, and that is actually the movement of the tectonic plates.
Look for fiber (for aid in digestion), carbohydrates (for quick energy), and fats (for long term energy)
<span>A. Work = integral of force across a path. Since the force is constant, just multiply them: force*distance = 200N * (1m*sin(30)) = 100 Nm = 100 J
B. Use Newton: F=ma. For this, we need to use the sum of all the forces, not just the work we apply on the books, but gravity and friction too. Constant velocity means zero acceleration, which means the sum of forces is zero. Draw a free body diagram with the three forces and you'll see that the uphill force = the downhil force =>
200N = NormalForce*Coefficient + Gravity*mass*sin(30)
200N = Gravity*mass*cos(30)*coef. + Gravity*mass*sin(30)
200N = 9.81*mass*(cos(30)*0.18 + sin(30))
mass = 200/(9.81*(cos(30)*0.18 + sin(30)))
m = 31.23 kg</span>
