1. A spring stretches 5.0 cm when a 200.-gram mass is hung from it and set to equilibrium. What is its spring constant?

2. When that spring in its unstretched state, if that mass is hung on the spring and
immediately let go, what will be the period (duration) of its oscillations?

3. A pendulum clock has a two-foot-long pendulum. The gears of the clock should be
calibrated so that how many cycles of the pendulum cause the clock hands to advance one
minute?

Aprojectile is launched from ground level with an initial velocity of v 0 feet per second. neglecting air resistance, its height in feet t seconds after launch is given by s equals negative 16 t squared plus v 0 t. find the time(s) that the projectile will (a) reach a height of 192 ft and (b) return to the ground when v 0equals112 feet per second. (a) find the time(s) that the projectile will reach a height of 192 ft when v 0equals112 feet per second. select the correct choice below and, if necessary, fill in the answer box to complete your choice.

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?

If you wanted to move an electron from the positive to the negative terminal of the battery, how much work w would you need to do on the electron? enter your answer numerically in joules.