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A 60 kg bicyclist rides his 7.8 kg bicycle with a speed of 16m/s. How much work must be done by the brakes to bring the bike and rider to a stop?
What is the minimum volume the contain can have without rupturing if it is designed to burst when the pressure inside reaches 10 Pa?
What travel time is required for the landing craft to reach the Earth as measured by Earth-based observers? What travel time is required for the landing craft to reach the Earth as measured by those
A volleyball is spiked so that it has an initial velocity of 14 m/s directed downward at an angle of 60° below the horizontal. What is the horizontal component of the ball's velocity when the o
A 14.0-kg box is being pushed from the bottom to the top of a frictionless ramp. When the box is pushed at a constant velocity, the nonconservative pushing force does 58.0 J of work.
A bumper car with mass m1 = 107 kg is moving to the right with a velocity of v1 = 4.6 m/s. A second bumper car with mass m2 = 99 kg is moving to the left with a velocity of v2 = -3.5 m/s. The two c
A spring constant 140 N/m and a damping coefficient of 71 g/s, what is the ratio of the amplitude of the damped oscillations to the initial amplitude at the end of 26 cycles?
A juggler (as shown above) throws each ball so it hangs in the air for 1.60seconds before landing in the other hand, 75cm away. What are the initial vertical and horizontal velocity components?
This process is repeated to cause the rotor to turn steadily at an angular speed of 3.84 103 rev/min. (a) Find the maximum torque acting on the rotor.
How long will it take her to reach the bottom of the hill, assuming she starts from rest and accelerates uniformly, if the elevation change is 335m?
Write the expression for the net torque acting on her with respect to the top of her head.
A uniform U-tube is partially filled with water. Oil, of density 0.75 g/cm3, is poured into the right arm until the water level in the left arm rises 3 cm. Determine the length of the oil column. W
How hard must she pull downward to raise herself slowly at constant speed? (b) If she increases this force by 19%, what will her acceleration be?
Suppose a car's brakes can produce an acceleration of -7 m/s2. If the car is traveling at an initial speed of 28 m/s, what is the minimum distance necessary to stop the car?
Calculate the depth in the ocean at which the pressure is three times atmospheric pressure. The acceleration of gravity is 9.81 m/s2 and the density of sea water is 1025 kg/m3 .
When the airport sends out a rescue crew, A) in which direction and how far should this crew fly to go directly to this plane?
A 0.40kg volleyball travels with a horizontal velocity of 5.0m/s over the net. You jump up and hit the ball back with a horizontal velocity of 6.0m/s . If the contact time is 0.050s, what was the m
Two forces are applied to a 50-kg box. One is 60.0 N to the south and the other is 80.0 N to the east. These are the only forces acting on the box. The magnitude of the acceleration of the box is
What is the velocity of the gasoline in the tube shortly after the tube is opened? Assume that the diameter of the gas tank is much larger than the diameter of the hose.
A bucket filled with water has a mass of 20 kg and is attached to a rope, which in turn, is wound around a 0.050-m radius cylinder at the top of a well. What torque does the weight of water and buc
Tritium has a half-life of 12.3 years. How many years will elapse when the radioactivity of a tritium sample diminishes to 20% of its original value?
A constant rate of 8.3 m/s. Also, it has an acceleration in the direction parallel to the walls of 4.8 m/s. At what angle with the wall will the particle strike?
Calculate the average speed of hydrogen nuclei in a gas with a temperature of 2 107K (recall MP8.1). Now compare this answer with the speed of a galaxy moving in a circular orbit of radius 1 Mpc aroun
Now, when both pipes vibrate at their fundamental frequencies, a beat frequency of 13.2 Hz is heard. How many centimeters were cut off the end of the second pipe?
In an x-ray machine, electrons are accelerated and then fired so that they are incident on a metal target. Which part of the process produces the characteristic x-ray spectra?