Need answer asap ! #23-24 deal with objects that fall from rest due to gravity. vi=0 and a=9.8 m/s/s 23. a piece of pipe drops off of a building and has been falling for 7 seconds. what is its final velocity (in m/s)? 24. if a ball falls from rest from the top of a tall building and reaches a velocity of 49 m/s, how long will it take (in s) before the ball reaches the ground?

For problems 1-3, consider a simple dc brush motor with a permanent magnet stator. with an an consider a simple dc brush motor with a permanent magnet ae supply voltage of 100 v, the no-load speed of the motor is 1000 rpm. this motor can provide a torque of 1.9 n-m at 800 rpm drawing a current of 2 a current are both zero at no load.) 1. with an armature supply voltage of 100 v, the motor is operated at 900 rpm. what is the motor torque? what is the mechanical power delivered by the motor? what is the current draw? what is the electrical power input? what is the energy efficiency of the motor? with an armature supply voltage of 100 v, the motor is operated at 1100 rpm (where it acts as a generator). what torque input is required? what mechanical power is required what current is generated? what is the electrical power generated? what is the energy efficiency of the motor acting as a generator? 2. with an armature supply voltage raised to 120 v, the motor is operated at 1000 rpm. what is the no-load speed? what is the motor torque? what is the mechanical power delivered by the motor? what is the current draw? what is the electrical power input what is the energy efficiency of the motor? 3.

We put a force of 50n on an object and the acceleration is 100 m/s². what is the mass of the object?

In science and physics what is the standard unit of measure for speed?