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The average force exerted on him by the ground is +18000 N, where the upward direction is taken to be the positive direction. From what height did the student fall? Assume that the only force acting
If a curve with a radius of 85 is properly banked for a car traveling 67 , what must be the coefficient of static friction for a car not to skid when traveling at 95 ?
What is the momentum of the 9000 kg railroad car before the collision? If the two railroad cars couple and move of together after collision, what is their velocity?
Find the magnitude and direction of the electric field at a distance (measured from the common center) of .20m.
Find the total electric flux out of the cylinder out of the ends of the cylinder used as the Gaussian surface in this problem?
A 5.8 g bullet leaves the muzzle of a rifle with a speed of 308 m/s. What force (assumed constant) is exerted on the bullet while it is traveling down the 0.9 m long barrel of the rifle?
If the combined effect of air resistance and rolling friction causes a deceleration of .50 m/s squared, after how long with the car come to a complete stop?
.What is the magnitude of the normal force exerted on the car by the walls of the cylinder at a) point A (at the bottom of the vertical circle)? b) point B (at the top of the vertical circle)?
Calculate the horizontal distance the ball would travel if the same spring were aimed 34.0 deg from the horizontal.
An air-track glider attached to a spring oscillates between the 10.0 {rm cm} mark and the 58.0 {rm cm} mark on the track. The glider completes 15.0 oscillations in 35.0 {rm s}. What are the (a) peri
Assume that each CD holds 650 megabytes of information. (a) If you packed the aircraft with as many CDs as it could hold, how much information could you store in megabytes.
If a curve with a radius of 85 is perfectly banked for a car traveling 71 , what must be the coefficient of static friction for a car not to skid when traveling at 86 ?
If the volume is 100 ml and the temperature is kept constant at 100 degrees kelvin, and if the initial pressure is 100 mmHg. What will the new volume be if the pressure increases to 200mmHg.
What is the turntable's angular speed when the block reaches the outer edge?
A student uses an audio oscillator of adjustable frequency to measure the depth of a water well. Two successive resonant frequencies are heard at 221 Hz and 247 Hz. The speed of sound in air is 344
A hole of radius R/2 is drilled into the disk, with the center of the hole at a distance R/2 from the center of the disk (the diameter of the hole spans from the center of the disk to its outer edge
A child is sliding on a sled at 1.6 {rm m/s} to the right. You stop the sled by pushing on it for 0.80 {rm s} in a direction opposite to its motion.If the mass of the child and sled is 40 {rm kg}, w
In hydrogen, the transition from level 2 to level 1 has a rest wavelength of 121.6 nm. Suppose you see this line at a wavelength of 120.5 nm in Star A and 121. 2 nm in Star B. Calculate each star's
The craft has velocity components of vx = 3630 m/s and vy = 4634 m/s. Find the magnitude and direction of the initial velocity. Express the direction as an angle with respect to the +x axis.
The wave is travelling to the right at 50.0 m/s. What is the amplitude if the maximum displacement is 38.0 cm and the total distance travelled by the wave is 16.0 m?
A transformer operating from 91 V (rms supplies a 8.1 V lighting system for a garden. Eight lights, each rated 34 W, are installed parallel. Find the equivalent resistance of the system.
A chair of weight 140N is sitting on the horizontal floor; the floor is not frictionless. You push on the chair with a force = 38.0 N that is directed at an angle of 38.0 below the horizontal and th
A 4.00 {rm A} current runs through a 12-gauge copper wire (diameter 2.05 {rm mm}) and through a light bulb. Copper has 8.5 times 10^{28} free electrons per cubic meter. How many electrons pass throu
A negative charge -21.00μ C is placed on the fourth corner. At the position of the negative charge, what is the magnitude of the electric field due to the three positive charges?
(a) How long does the projectile remain in the air? (b) At what horizontal distance from the firing point does it strike the ground? (c) What is the magnitude of the vertical component of its veloci