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?

Física: un futbolista patea hacia el arco con una velocidad de 15m/ah, calcular: a)el alcance para un ángulo de tiro de 25º, b) el tiempo que el balón permanece en el aire.

During the experiment if you could triple the breakaway magnetic force with all other quantities left unchanged, what is the new value for the critical velocity if it was v0 (initial velocity), initially? (b) now if you halved the radius with all other quantities left unchanged, what is the new critical velocity if it was v0 (initial velocity), initially? (c) if during the experiment, critical velocity quadrupled with all other quantities left unchanged, what is the new breakaway force if its magnitude was initially f0,?

What is the kinetic energy of a baseball moving at a speed of 40 m/s if the baseball has mass of 0.15 kg?