Afree-falling golf ball strikes the ground and exerts a force on it. which sentences are true about this situation?
a. a golf ball striking the ground is a collision.
b. the ground exerts an equal force on the golf ball.
c. the ground doesn’t exert a force on the golf ball.
d. the force is zero because the golf ball has little mass.

What type of light does this light bulb produce most (i.e. at what wavelength does the spectrum have maximum intensity)?

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.

1.what is where an object is located 2. what is how fast an objects speed is changing 3. what is how fast an object is moving