A baseball thrown straight up takes 1.50 seconds to reach its maximum height. What was its initial velocity as it was thrown?

How is the gravitational force related to the distance between two objects?

70 give a real life example showing how sensory neurons work with the motor neurons

Ahot-air balloon takes off from the ground traveling vertically with a constant upward acceleration of magnitude g/4. after time interval δt, a crew member releases a ballast sandbag from the basket attached to the balloon. how many seconds does it take the sandbag to reach the ground? (express your answer in terms of δt)