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How much work must be done by the brakes to bring the bike and rider to a stop? How far does the bicycle travel if it takes 3.5 s to come to rest?
The ball strikes the wall horizontally with a speed of 11 m/s, and it bounces back with this same speed. The ball is in contact with the wall 0.05 s. What is the average force exerted on the wall by
Using a crowbar to lift a rock is much easeir than lifting it with hands. does this mean that less work is done you use a crowbar to lift the rock than using your bare hands.
A planet's moon travels in an approximately circular orbit of radius 6.6 107 m with a period of 7 h 9 min. Calculate the mass of the planet from this information.
If the sound has a frequency of 2400 Hz, by what percentage does its wavelength change in crossing the boundary?
Determine the particle's equation of motion, specifying its position as a function of time. (b) Where in the motion is the potential energy three time the kinetic energy?
In the drawing, the weight of the block on the table is 440 N and that of the hanging block is 210 N. Ignore all frictional effects, and assuming the pulley to be massless. Find the acceleration of
The sound of the blow twice (once through the air and once through the rod), with a 332 ms interval between them. How long is the rod?
The astronaut measures his pulse rate at 75 beats per minute. Signals generated by the pulse rate are radioed to Earth. What pulse rate does the Earth observer measure?
The catapult of the aircraft carrier USS Abraham Lincoln accelerates an F/A-18 Hornet jet fighter from rest to a takeoff speed of 77.33 in a distance of 93.57 . Assume constant acceleration. Calcul
Consider the system with m1 = 25.00 kg, m2 = 10.20 kg, R = 0.18 m, and the mass of the uniform pulley. Find the time interval if the pulley were massless.
A uniform magnetic field of magnitude 0.078 T passes through a circular area of radius 0.1 m. The magnetic field lines are oriented at an angle of 25 degrees with respect to a line that is normal t
Two stars have the same temperature, but the absorption lines of one are narrower than the absorption lines of the other. What could be the reason for this?
A heating element of resistance (at its operating temperature) 534 Ω is connected to a battery of emf 735 V and unknown internal resistance.
Find (a)the magnitude and (b) direction of the weakest electric field that can bring the proton uniformly to rest over a distance of 3.40 .
A particle with a charge of q = -5.10 nC is moving in a uniform magnetic field of vec{B}=( -1.24 T ) hat{z}. The magnetic force on the particle is measured to be vec{F}= ( -7.60×10-7 N )hat{y
What is the strength of an electric field that will balance the weight of a 1.0 {rm g} plastic sphere that has been charged to -3.0{rm nC}?
What sort of spectrum would you see if you were (a) on the opposite side of the gas from the source ? (b) off to the side ? Explain.
Find the tension in the wire. Find the horizontal component of the force exerted on the rod by the hinge. Find the vertical component of the force exerted on the rod by the hinge.
A 57.4 kg person running tangential to the rim of the merry-go-round at 3.01 m/s jumps onto its rim and holds on. Before jumping on the merry-go-round, the person was moving in the same direction a
A spring of negligible mass stretches 3.00 cm from its relaxed length when a force of 6.20 N is applied. What are the maximum velocity and the maximum acceleration of the particle?
Determine the equation of state for microcanonical system the number of microstate=a(E/v)^bN where a and b are constants
A 22kg box slides 4.0m the frictionless ramp that is angled at 30* above the horizon. The box collides with a spring whose spring constant is 210. What is the max compression of the spring?
It was your turn to straighten up the lab, but, oh great, someone spilled a solution on the floor for you to clean up. Which isotope do you suspect was in the bottle?
A uniform ladder whose length is 5.6 m and whose weight is 490 N leans against a frictionless vertical wall. The coefficient of static friction between the level ground and the foot of the ladder i