The tendency to cause a rotation is measured as the torque. the torque (τ, lowercase greek tau) depends both on the magnitude of the force (f) and on a distance called the lever arm (ℓ). as a formula, τ = fℓ. the units for torque are newton*meters (n*m) the most straightforward torque calculation involves a force that is applied perpendicular to a board which has a hinge at one end (the board will rotate around the hinge). in the following example a force of 78.0 n is applied perpendicular to the board at a distance 1.26 m from the hinge. what is the magnitude of the torque?

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.

Amother used 150 watts of power to raise a 15 newton object in a time interval of 8.0 seconds. through what vertical distance was the object raised ?

What is the magnitude of the gravitational force acting on the earth due to the sun?