Un atleta de 70 kg de masa que ha efectuado un salto de altura cae una vez que ha sobrepasado el listón, identifica y dibuja las fuerzas que actúan sobre el atleta cuando:

a)En el momento que está impulsándose en el suelo.

b)Va cayendo. ¿Qué tipo de movimiento tiene en este caso?

c)Al chocar con la colchoneta.

a) the elastic force of the pole directed upwards and the force of gravity with dissects downwards

Explanation:

The forces on the athlete are

a) at this moment the athlete presses the garrolla against the floor, therefore it acquires a lot of elastic energy, which is absorbed by the athlete to rise and gain potential energy,

therefore the forces are the elastic force of the pole directed upwards and the force of gravity with dissects downwards

b) when it falls, in this case the only force to act is batrachium by the planet, this is a projectile movement for very high angles

c) When it reaches the floor, it receives an impulse that opposes the movement created by the mat. The attractive force is the attraction of gravity.

at positions a, g kinetic energy is maximum.

at position d, potential energy is maximum.

causes

fossil fuels burn

cities become more industrialized

human population grows worldwide