A hockey stick is 150cm long, the effort arm of the stick is 50cm. What is the mechanical advantage of the stick?

What is the speed of an object at a given moment?

Ain is , is 's of ? 0.62 0.79 1.27 1.50

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)