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Problem: Running on a treadmill is slightly easier than running outside because there is no drag force to work against. Suppose a 60 kg runner completes a 5.0 km race in 20 minutes.
Part I: Determine the drag force on the runner during the race. Suppose that the cross section area of the runner is 0.72 m2 and the density of air is 1.2 kg/m3.
Please show all work and steps for determine the drag force on the runner during the race.
A clean nickel surface is exposed to light of wavelength 216 nm. What is the maximum speed of the photoelectrons emitted from this surface
A coil has resistance R=5 Ohms and inductance L=5 milliHenries and is powered by a generator with variable frequency and maximum voltage V = 10 Volts. What is the average power used by the coil
A solenoid 2.9 m long has a radius of 0.85 cm and 630 turns. It carries a current I of 2.5 A. What is the approximate magnetic field B on the axis of the solenoid
A proton with a speed of 2.0 x 106 m/s is shot into aregion between two plates that are separated by a distance of 0.15m. As the drawing shows, a magnetic field exists between the plates, and it is perpendicular to the velocity of the proton.
for an equatorial radius of 6370 km the circumference is 40024 km.. so consider this circumference as a long steel
Suppose a car is traveling at +22.5 m/s, and the driver sees a traffic light turn red. What is the stopping distance of the car
An Earth satellite has a speed of 29500 km/hr when it is at its perigee, 230 km above Earth's surface. Find the apogee distance, the speed at apogee, and the period of revolution.
A 2.63g aluminum bullet at 31.9 degrees C is fired at a speed of 204 m/s into a large block of ice at 0 degrees C, in which it embeds itself. What quantity of ice melts
(a) What is the x component of the net electrostatic force on particle 3. (b) What is the y component of the net electrostatic force on particle 3
Consider a particle of radius s that orbits a solar mass star at 1 au on a circular orbit.Calculate the mass of gas that the particle collides with during one orbit about the star
A swimming duck paddles the water with its feet once every 1.8sec,producing surface waves with this period. How far apart are the crests behind the duck
ocean waves with wavelength 1.2 m and period 1.5s are moving past a pier. a boy runs along the pier, in the direction opposite to the motion of the wave, at 3.5 m/s. how many wave crests pass the boy each second?
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