A 20.0 g ball is pushed against the spring of a toy gun. The spring constant is 200. N/m. Use conservation of energy If the spring was compressed 5.0 cm, how much elastic potential energy does the toy gun have? If the trigger is pulled and the spring comes to its original, uncompressed position, what will be the speed given to the ball? If the toy gun had been pointed vertically upward when the trigger was pulled, how high will the ball rise above the uncompresssed position of the spring?

What is the measurement of how fast an object moves relative to a reference point?

Considering only the earth's rotation, determine how much later the asteroid would have had to arrive to put the explosion above helsinki at longitude 25˚ e? this would have obliterated the city.

You have two photos of a person walking. one shows the person at the corner of third and main streets, the other shows the person at the corner of tenth and main streets. there are lampposts at every corner in this town, and the first picture shows it to be 10: 32: 00 exactly. the second picture shows it to be 10: 49: 30. you know three facts: (1) all of the clocks are synchronized; (2) there are exactly 12 equal-sized blocks per kilometer in this town; and (3) the streets that cross main in this area are numbered consecutively, with no interruptions. what is the person’s average speed in kilometers per hour?