A bike and rider, 115-kg combined mass, are traveling at 7.6 m/s . A force of 125 N is applied by the brakes. What braking distance is needed to stop the bike?

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration

An electromagnetic wave with frequency 65.0 hz travels in aninsulating magnetic material that has dielectric constant 3.64 andrelative permeability 5.18 at this frequency. the electric fieldhas amplitude 7.20 \times 10^{ - 3} {\rm v}/{\rm m}. a. what is the speed of propagation of the wave? b.what is the wavelength of the wave? c.what is the amplitude of the magnetic field? d.what is the intensity of the wave?