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A hockey puck is sliding along the ice with nearly constant momentum ‹ 3, 0, 3 › kg · m/s when it is suddenly struck by a hockey stick with a force ‹ 0, 0, 1650 ›
A beam of light enters the oil from above the glass with an incident angle of 57.0°. What is the refraction angle of the light leaving the oil-water interface?
In coming to a stop, a car leaves skid marks 87.0 m long on the highway. Assuming a deceleration of 6.90 m/s2, estimate the speed of the car just before braking.
what are the angles between the cable supporting the load and the beam and between the cable supporting the beam and the beam?
A Ferris wheel with radius 14.0 m is turning about a horizontal axis through its center. The linear speed of a passenger on the rim is constant and equal to 7.81 m/s. What is the magnitude of the pa
Ships A and B leave port together. For the next two hours, ship A travels at 26 mph in a direction 40 degree west of north. What is the distance between the two ships two hours after they depart? = 59
Two devices with capacitances 25µF and 3.2µF are each charged with separate 148 V power supplies. Calculate the total energy stored in the two capacitors.
What are the strength and direction of an electric field that will balance the weight of a 1.1 g plastic sphere that has been charged to -3.6 nC?
If a sound wave traveling in air approaches a plane water surface at an angle of incidence of 3.4°, what is the angle of refraction?
A 95- water skier floating in a lake is pulled from rest to a speed of 13 m/s in a distance of 27 m. What is the net force exerted on the skier, assuming his acceleration is constant?
The electric field just above the surface of Earth has been measured to typically be 158 N/C pointing downward What is the total charge on Earth's surface implied by this measurement?
A stunt man whose mass is 70 kg swings from the end of a 4.0 m long rope along the arc of a vertical circle. Assuming that he starts from rest when the rope is horizontal, find the tensions in the r
A car traveling east at 40 m/s passes a trooper hiding at the roadside. The driver uniformly reduces his speed to 25 m/s in 3.5 s. What is the magnitude and direction of the car's acceleration ?
A baseball is seen to pass upward by a window 27 above the street with a vertical speed of 11. What is the balls initial speed?
The tension is such that the block just comes to rest when it reaches the bottom of the incline. (The person's force is nonconservative!) What is this constant tension?
An experiment that can be used to measure the velocity of a bullet is to have two cardboard disks attached to a rotating shaft some distance apart and to measure the angular separation of the holes
A load is suspended by cable fro a beam supported by another cable. The angle between the beam and the horizontal is 66 degrees and the angle between supporting cable and the horizontal is 39 degree
A car starts from rest on a curve with a radius of 190 m and accelerates at 1.30 m/s^2. How many revolutions will the car have gone through when the magnitude of its total acceleration is 2.40 m/s^2
A bucket of mass 2.50 kg is whirled in a vertical circle of radius 1.45 m. At the lowest point of its motion the tension in the rope supporting the bucket is 33.0 N. Find the speed of the bucket, an
A ball of radius 0.200 m rolls with a constant linear speed of 3.39 m/s along a horizontal table. The ball rolls off the edge and falls a vertical distance of 2.00 m before hitting the floor. What i
How much energy is needed to pop 95.0 grams of corn if 14 percent of a kernel's mass consists of water? Assume that the latent heat of vaporization for water at 175 degrees Celsius.
A 1100 kg car rounds a curve of 59 m banked at an angle of 18 degrees. If the car is traveling at 98 km/h, will a friction force be required? If so, in what direction?
Chameleons catch insects with their tongues, which they can rapidly extend to great lengths. In a typical strike, the chameleon's tongue accelerates at a remarkable 250 m/s^2 for 20 ms, then t
A 15 g bullet traveling at 489 m/s strikes an 0.82 kg block of wood that is balanced on a table edge 0.82 m above the ground. If the bullet buries itself in the block, find how far along the ground
Find the total mechanical energy of the ball when it is a height h above the equilibrium position of the spring. Assume that h < h_{rm max} , so that the ball has some velocity v.