You pick up your backpack to place it on your shoulders. You lifted it from the ground to a height of 1.55m. The backpack has a mass of 16 kg. How much work in joules (J) was performed when you lifted the backpack? (round answer to nearest 10th place) *

During spring semester at mit, residents of the parallel buildings of the east campus dorms battle one another with large catapults that are made with surgical hose mounted on a window frame. a balloon filled with dyed water is placed in a pouch attached to the hose, which is then stretched through the width of the room. assume that the stretching of the hose obeys hooke's law with a spring constant of 89.0 n/m. if the hose is stretched by 5.80 m and then released, how much work does the force from the hose do on the balloon in the pouch by the time the hose reaches its relaxed length? unitst 3 number-1497 the tolerance is +/-5% open show work click if you would like to show work for this question:

1.what is where an object is located 2. what is how fast an objects speed is changing 3. what is how fast an object is moving

Lacie kicks a football from ground level at a velocity of 13.9 m/s and at an angle of 25.0° to the ground. how long will the ball be in the air before it lands? how far will the football travel before it lands?