Beneficios de la actividad física, 1 párrafo y cinco líneas. porfavor​

Will pushing on a car always change the cars mechanical energy? what must happen for the cars kinetic energy to increases?

Abody of weight 60 kg is standing in a lift the lift going upward with a uniform velocity of 4.9 metre per second slows down and stops in two seconds then apparent weight of the body during the slow down process is

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?