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How much work is done by the force of friction as the block moves through the rough area? At what height h above the ground is the block released? How much work is done by the gravity force through th
(a) How high above the ground is the highest point that the skateboarder reaches? (b) When the skateboarder reaches the highest point, how far is this point horizontally from the end of the ramp?
The entering car maintains its acceleration. How much time is required for the entering car to catch up with the other car?
Two gerbils run in place with a linear speed of 0.60 on an exercise wheel that is shaped like a hoop. Find the angular momentum of the system if each gerbil has a mass of 0.22 and the exercise whee
A metal rod of length 30.0 cm and mass 100.0 g is placed horizontally on a smooth inclined plane at an angle 30° to the horizontal. The rod is in a region where a horizontal magnetic field of 0
What is the acceleration of the bullet while in the barrel? A bullet in a rifle barrel does not have constant acceleration, but constant acceleration is to be assumed for this problem.
A 1.8 m rod with uniform mass distribution runs along the y axis with its top end at the origin. Find the coordinates of the center of gravity for this system.
In 2000, NASA placed a satellite in orbit around an asteroid. Consider a spherical asteroid with a mass of 1.00×10^16 kgand a radius of 8.00km. What is the speed of a satellite orbiting 5.70km
A rocket is launched at an angle of 51.0 above the horizontal with an initial speed of 96 m/s. Find the maximum altitude reached by the rocket.
A proton travels with a speed of 8.34×105 m/s at an angle of 32.3° with the direction of a magnetic field. The field exerts a force of 3.00×10-17 N on the proton. What is the streng
A 1.0 ball hangs from the ceiling of a truck by a 1.0--long string. The back of the truck, where you are riding with the ball, has no windows and has been completely soundproofed. The truck travels
The passengers on the ship measure a time of 40h for the trip. What time would an observer on one of the two planets measure for the same trip?
It collides with and sticks to the 575g glider. a.What is the amplitude of the subsequent oscillations? b.What is their period?
What is the electric field strength at a point in space where a proton (m=1.67x10^(-27)kg) experiences an acceleration of 1million g's ?
A pitcher throws a fastball horizontally at a speed of 140 km/h toward home plate, 18.4m away. If the batter's combined reaction and swing times total 0.35s, how long cant he batter watch the ball
what is the necessary optical aperture diameter at a blue wavelength? At a red wavelength? At an NIR wavelength? If one optical system is to meet the design goal at all three wavelengths. What apert
For a damped oscillator with a mass of 350 g, a spring constant 75 N/m and a damping coefficient of 78 g/s, what is the ratio of the amplitude of the damped oscillations to the initial amplitude at
The neutron star has a mass of 2.78×1030 kg and the black hole has a mass of 9.94×1030 kg. What is the magnitude of the gravitational attraction between the two?
Astronomers detect a large asteroid thats far away but still heading toward earth at 754 m/s. A straight trajectory would bring it within 3.3 x 10^8 of the earth. However, the earth's gravitational
The potential at location A is 4545 V. A positively charged particle is released there from rest and arrives at location B with a speed vB. The potential at location C is 1340 V, and when released
What mass (in grams) of steam at 100°C must be mixed with 192 g of ice at its melting point, in a thermally insulated container, to produce liquid water at 58.0°C? The specific heat of wate
When the altitude of the plane is 2.8 km, a flare is released from the plane. The flare hits the target on the ground. What is the angle θ?
An iron tower in is 399 meters tall on a cold day (T = -6.7 degrees Celsius). What is its height of the tower on a hot day when the temperature is 31.5degrees Celsius?
A 8.6{rm kg} dog takes a nap in a canoe and wakes up to find the canoe has drifted out onto the lake but now is stationary. He walks along the length of the canoe at 0.54{rm m/s} , relative to the w
Find the magnitude and direction of the velocity with which the fuel tank hits the ground if it is from each plane. Give the directional angles with respect to the horizontal.