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A 0.142kg baseball traveling 47.4m/s strikes the catcher's mitt, which, in bringing the ball to rest, recoils backward 10.5cm. What was the magnitude of the average force applied by the ball on the
You hang the rod vertically and attach a 105 kg mass to the bottom, and you observe that the bar becomes 1.01 cm longer. Calculate the effective stiffness of the interatomic bond, modeled as a "spri
A 49 kg child sits in a swing supported by two chains, each 2.8 m long. The acceleration of gravity is 9.8 m/s2 . If the tension in each chain at the lowest point is 288 N, find the child's speed at
Find the speed of a satellite moving around the earth in a circular orbit that has a radius equal to six times the earth's radius of 6.38 106 m. Find the satellite's orbital period.
10 identical springs are placed side-by-side (in parallel), and connected to a large massive block. The stiffness of the 10-spring combination is 3500 N/m. What is the stiffness of one of the indiv
A kayaker needs to paddle north across a 100m wide harbor. The tide is going out, creating a tidal current that flows east at 2.0m/s. The kayaker can paddle with a speed of 3.0m/s.
Two pieces of plastic, a full ring and a half ring, have the same radius and charge density (charge per length). Which electric field at the center has the greater magnitude? Defend your answer.
When aimed vertically and suddenly released, the spring sends the bearing to a height of 1.43 m. Calculate the horizontal distance the ball would travel if the same spring were aimed 25.0o from the
What is the magnitude of the torque exerted by the entire flagpole at the point
a motor boat haeds due east at 5.0 m/s acorss a river that flows toward the south at 5 m/s. If the river is 125m wide, how longs does it take the boat to cross the river?
What is the terminal speed for an 84.0 skier going down a 44.0 snow-covered slope on wooden skis = 0.060?
After 2.10 s, the helicopter releases a small mailbag. How long after its release does the mailbag reach the ground?
A 19 g rifle bullet traveling 210 m/s buries itself in a 3.4 kg pendulum hanging on a 3.0 m long string, which makes the pendulum swing upward in an arc. Determine the vertical and horizontal compo
A 46.8 kg girl is standing on a 169 kg plank. The plank, originally at rest, is free to slide on a frozen lake, which is a flat, frictionless surface. The girl begins to walk along the plank at a co
A projectile is fired horizontally from a gun that is 57.0 m above flat ground, emerging from the gun with a speed of 180 m/s. (a) How long does the projectile remain in the air? (b) At what horizo
Explain the importance of a universal standard in measurement. Elaborate your answer in terms of metric system and conversions
Uniform circular disk is attached at the rim to a vertical shaft and is used as a cam. Two views of the disk and shaft are shown. The disk has a diameter of 32 cm and a mass of 140 grams. The shaft
A -12 nC charge is located at the origin. What is the strength of the electric field at the position (x,)= (-5.0 cm, -5.0 cm)? E= _____ N/C
The speed -time graph of a particle moving along a fixed direction is shown below.Obtain the distance travelled by the particle between t=0 and t=10s. What is the average speed of the particle over
A 4.39 kg block slides down a smooth, frictionless plane having an inclination of 25 . The acceleration of gravity is 9.8 m/s/s Find the acceleration of the block.
What value of magnetic field is required to accelerate deuterons? What is the Deuteron energy? (charge of deuteron = Ie, and mass of deuteron is 2mp).
"Three equal point charges, each with charge 1.85*10^-6 C , are placed at the vertices of an equilateral triangle whose sides are of length 0.300m. What is the electric potential energy of the syst
Young's Double Slit Experiment is performed with 589 nm light and a distance of 2.00 m between the slits and the screen. The fifth interference minimum is observed 7.50 mm from the central maximum.
A wrecking ball is suspended from a 3.5-m-long cable that makes a 20 angle with the vertical. The ball is released and swings down. What is the ball's speed at the lowest point?
A car drives off the edge of a cliff that is 46 meters high. The point of impact is 127 meters from the base of the cliff. How fast was the car traveling when it went over the cliff?