1. analyze the number line above to describe the motion of the object. be sure to include starting position, intermediate position, ending position, distance traveled, and displacement in your answer.

2. an object travels a distance of 6 meters in 2 seconds if average speed is found using the equation “ distance traveled/elapsed time” what is the average speed of the object? be sure to include units in your answer.

3. an object has a displacement of +12 meters in six seconds. if average velocity is found using the equation “ change of position/elapsed time” what is the average velocity of the object? be sure to include the correct sign and units in your answer.

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 790 n/m. it is initially at rest on an inclined plane that is at an angle of 28 degrees with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is k = 0.14. in the initial position, where the spring is compressed by a distance of a = 0.18 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. b) if the spring pushes the block up the incline, what distance, l, in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.

5g of ammonium nitrate was dissolved in 60g of water in an insulated container. the temperature at the start of the reaction was 23.0°c and at the end it was 19.0°c. calculate the energy absorbed by the reaction.

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2