Q2. A rock is tossed straight up fromground level with a speed of 25m/s. When it returns, it falls into a hole 25m deep.(a)What is the rock's velocity just beforeit hits the bottom of the hole

Avoltaic cell converts chemical energy to

In which of the following is positive work done by a person on a suitcase

Suppose a soccer ball is kicked from the ground at an angle 20.0º above the horizontal at 8.00 m/s. the y-velocity is determined to be 2.74 m/s. how long will the ball be in the air? assume the ball lands at the same height at which it was kicked.