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A ball rolls horizontally off the edge of a tabletop that is 0.78 m high. It strikes the floor 2.80 m away from the edge of the table. What is the initial (horizontal) velocity of the ball?
A harmonic wave travels in a wire with amplitude 5.69 mm, wavelength 1.03 m, and frequency 438 Hz. What is the speed with which the wave travels?
A block rests on a ?at plate that executes vertical simple harmonic motion with a period of 1.35 s. What is the maximum amplitude of the motion for which the block does not separat
A speedboat starts from rest and accelerates at +2.01 m/s2 for 7.40 s. At the end of this time, the boat continues for an additional 5.90 s with an acceleration of +0.518 m/s2. Following this, the b
A 18.0 kg gold bar at 27.0°C is placed in a large, insulated 0.800 kg glass container at 15.0°C with 2.00 kg of water at 25.0°C. Calculate the final equilibrium temperature.
A 15 g rifle bullet traveling 190 m/s buries itself in a 3.8 kg pendulum hanging on a 3.0 m long string, which makes the pendulum swing upward in an arc. Determine the horizontal component of the p
A constant torque of 23.5 N·m is applied to a grindstone whose moment of inertia is 0.130 kg·m2. Using energy principles, and neglecting friction, find the angular speed after the grin
This is accomplished using two small rockets, each with 130 thrust, that are mounted on the rim of the station. How long will it take to reach the desired spin rate?
A car is traveling 17.0 m/s when the driver sees a child standing on the road. She takes .80 s to react, then steps on the brakes and slows at 6.5 m/s squared. How far does the car go before it stop
A 93-{rm kg} water skier floating in a lake is pulled from rest to a speed of 12 m/s in a distance of 26 m. What is the net force exerted on the skier, assuming his acceleration is constant?
On cm extends above the water level. If you shaved off the 1 cm part, how many centimeters of the remaining ice would extend above water level?
In the deep ocean, a water wave with wavelength 95 {rm m} travels at 12 {rm m}/{rm s}. Suppose a small boat is at the crest of this wave, 1.5 {rm m} above the equilibrium position. What will the ver
Find the electric potential at the empty corner of the three charges are held in place in the figure below, where length x = 0.15 m and height y = 0.10 m
A car is designed to get its energy from a rotating flywheel with a radius of 2.0 m and a mass of 600 kg. Before a trip, the flywheel is attached to an electric motor, which brings the flywheel's ro
Certain neutron stars (extremely dense stars) a believed to be rotating at about 1 rev/s. If such a star has a radius of 16 km, what must be its minimum mass so that material on its surface remains
You decide to make a circular pen, because if you wish to enclose an area using a given length of fencing, then a circular fence encloses a larger area than a fence of any other shape. What is the r
A cannonball launched with an initial velocity of 151 m/s at an angle of 50° follows a parabolic path and hits a balloon at the top of its trajectory. Neglecting air resistance, how fast is it
A wave in the ocean has amplitude of 3 m. Winds pick up suddenly, increasing the wave's amplitude to 6 m. How does this change in amplitude affect the wave's frequency and the amount of energy it t
A non-conducting rod with a uniformly distributed charge +Q. The rod forms a 10/21 of circle with radius R and produces an electric field of magnitude Earc at its center of curvature P. If the arc
A 16.0 kg sled is being pulled across a horizontal surface at a constant velocity. The pulling force has a magnitude of 81.5 N and is directed at an angle of 30.0° above the horizontal. Determi
The glider is pushed in 10.2 cm and released. A student with a stopwatch finds that 12 oscillations take 14.5 s. What is the spring constant?
A 55.0 kg pole vaulter running at 8.0 m/s vaults over the bar. Assuming that the vaulter's horizontal component of velocity over the bar is 1.0 m/s and disregarding air resistance, how high was the
What is the force of air resistance on a 100kg sky-diver who is falling with a constant acceleration of 4m/s/s?
A 1.00 g cork ball with charge 2.00 uC is suspended vertically on a 5.00 m long, light string in the presence of a uniform, downward-directed electric field of magnitude E = 1.00 x 10^5 N/C. If th