Ahelicopter is lifting two crates simultaneously. one crate with a mass of 2.800 × 102 kg is attached to the helicopter by a cable. the second crate with a mass of 1.700 × 102 kg is hanging below the first crate and attached to the first crate by a cable. as the helicopter accelerates upward at a rate of 1.39 m/s2, what is the tension in each of the two cables?

Which of the following is an example of units for speed

Three different objects, all with different masses, are initially at rest at the bottom of a set of steps. each step is of uniform height . the mass of each object is a multiple of the base mass : object 1 has mass 4..00m , object 2 has mass 1..96m , and object 3 has mass . when the objects are at the bottom of the steps, define the total gravitational potential energy of the three-object system to be zero. if the objects are then relocated as shown, what is the new total potential energy of the system? each answer requires the numerical coefficient to an algebraic expression. each algebraic expression is given using some combination of the variables , , and , where is the acceleration due to gravity. enter only the numerical coefficient. (example: if the answer is 1..23mgd , just enter 1.23)

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?