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A softball player swings a bat, accelerating it from rest to 2.8 in a time of 0.30 . Approximate the bat as a 2.6- uniform rod of length 0.92 , and compute the torque the player applies to one end
What minimum constant acceleration does the aircraft require if the aircraft is to be airborne after a takeoff run of 222 m?
A second charge, q2 = -3.00 micrcoulombs, is on the x-axis 0.800 m from the origin. Find the electric field at a point on the y-axis 0.500 m from the origin.
What is the displacement of a particle at position x = 2.7 m at time t = 5.8 s? Note: Remember that the argument of the sine function in the wave equation is expressed in radians.
The magnitude of the magnetic field varies with time as given by B = 50 sin(10 πt) mT where t is measured in s. What is the magnitude of the induced current in the coil at 0.10 s? draw physics di
For the worst case scenario, assume that there is no frictional force between the car and road due to the ice. If the maximum compression of the spring from its equilibrium position is D, your job i
The resistor in an circuit has a resistance of 145 ohms. What capacitance must be used in this circuit if the time constant is to be 3.4 ms ? Using the capacitance determined in part (a), calculate
A 71-kg skier is going down a slope oriented 30° above the horizontal. The area of each ski in contact with the snow is 0.13 m2. Determine the pressure that each ski exerts on the snow.
Velocity of 2.52 throws a .151 snowbal to the right with a velocity of 33.7 relative to the ground. what is the velocity of the ice skater after throwing the snowball?
A library ladder of length L rolls on wheels as shown in the figure below. The two legs of the ladder freely pivot at the hinge at the top. The legs are kept from splaying apart by a light-weight c
A 15.4 kg block is dragged over a rough, horizontal surface by a constant force of 187 N acting at an angle of angle 26.6 above the horizontal. The block is displaced 9.41 m and the coefficient of
The engineer applies the brakes at a crossing, and later the last car passes the crossing with a speed of 16.5 km/h. Assuming constant acceleration, determine how long the train blocked the crossing
What would the bank angle be for a circular racetrack with radius 120 m so that a car can go around the curve safely at a maximum of 21 m/s, without the help of frictional force to keep it on the r
Bonnie and Clyde are sliding a 309 kg bank safe across the floor to their getaway car. The safe slides with a constant speed if Clyde pushes from behind with 385 N of force while Bonnie pulls forwa
What is the wavelength of a photon emitted when the electron in the infinite well makes a transition from the first excited state to the ground state?
Use energy considerations to determine the drum's rotation rate when the anchor hits the water. Neglect the mass of the cable.
Young's double-slit experiment is performed with 560 nm light and a distance of 2.00 m between the slits and the screen. The tenth interference minimum is observed 7.44 mm from the central maximum.
The dipole moment of a water molecule is 6.2 times 10^{ - 30};{rm C} {rm m} . What is the electric potential 1.0 nm from a water molecule along the axis of the dipole?
Her friends are busy, so Tashaseesaws by herself by putting the support at the systems center of gravity when she sits on one end of the board. How far is shefrom the support point?
A projectile is fired horizontally from a gun that is 54.0 m above flat ground, emerging from the gun with a speed of 200 m/s. (a) How long does the projectile remain in the air? (b) At what horizo
What whistle frequency is consistent with his explanation? The speed of sound is 343 m/s at this temperature. If you get this problem wrong, drop and give us 50.0 pushups!
An artillery shell is fired with an initial velocity of 300 m/s at 53° above the horizontal. To clear an avalanche, it explodes on a mountainside 37.5 s after firing. What are the x and y compo
A very long nonconducting cylinder of diameter 10.0 cm carries charge distributed uniformly over its surface. Each meter of length carries +5.50 C of charge. A proton is released from rest just outs
An isolated copper sphere of radius 4.85 cm, initially uncharged, is illuminated by ultraviolet light of wavelength 244 nm. The work function for copper is 4.70 eV. What charge does the photoelectr
Car accelerates from rest at the same point with an acceleration of 2m/sec2. a) Where and when does the car catch the truck? What are there velocities when they meet?