Una gru a torre è dotata di un braccio lungo 8,00 m (misurati dalla torre) e sta movimentando un carico di mattoni di massa 500 kg posizionato all’estremo del braccio. La gru è dotata di una zavorra di controbraccio di 1000 kg formato da diverse lastre di cemento posizionate alla stessa altezza del braccio ma dalla parte opposta e a una certa distanza dal traliccio verticale. A che distanza dal traliccio dovrebbe essere posizionato il baricentro della la zavorra di controbraccio affinché il sistema sia in equilibrio?

Which lists the main components of darwin’s theory of evolution? a. random mutations drive evolution; the evolution of a population happens slowly; organisms have common ancestors; organisms do not change. b. natural selection drives evolution; the evolution of a population happens slowly; organisms have common ancestors; organisms change over time. c. natural selection drives evolution; the evolution of a population happens rapidly; organisms have common ancestors; organisms change over time. d. random mutations drive evolution; the evolution of a population happens rapidly; organisms have common ancestors; organisms do not change.

The graph represents the distance a car travels over time while on the highway. which statement about the car's trip is accurate? a) the car does not move over time. b) the car travels at a constant velocity. c) the car's velocity increases constantly over time. d) the car's velocity decreases constantly over time.

Compare the horizontal displacement of the two balls as they travel to the ground. what do you observe?