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During a violent thunderstorm, hail the size of marbles (diameter = 1.6 cm) falls at a speed of 36 m/s. There are estimated to be 50 hailstones per cubic meter of air. Assume that, as for ice, 1 cm3
A proton is moving in the uniform electric field of part A. At point A, the velocity of the proton is 1.87×10^4 m/s, again pointed towards the east. What is the speed of the proton at point B?
The rocket fires for 10 mins , after which the asteroid is moving at 28 degrees to its original path at a speed of 20 km/h/. Find its average acceleration.
Joe has a ring weighing 13 grams made of an alloy of 16 silver and the rest gold. He decides to melt down the rings and add enough silver to reduce the gold content to 69 . How many grams of silver
The force she exerts is 35 N at an angle of 55° above the horizontal. Find the coefficient of kinetic friciton between the flight bag and the floor.
Released from rest at the same height, a can of frozen juice rolls to the bottom of the same hill. What is the translational speed of the frozen juice can when it reaches the bottom?
A bucket is made from thin sheet metal. The bottom and top of the bucket have radii of 21.0 cm and 39.0 cm, respectively. The bucket is 30.0 cm high and filled with water. Where is the center of gr
On a part-time job, you are asked to bring a cylindrical iron rod of density 7800 kg/m^3 , length 90.3 cm and diameter 2.55 cm from a storage room to a machinist. Calculate the weight of the rod, w
Under these simplified conditions, what value must the safety factors exceed to prevent pancake collapse of the building?
In an 8.00 km race, one runner runs at a steady 11.0 km/h and another runs at 14.3km/hr. How far from the finish line is the slower runner when the faster runner finishes the race?
Consider two straight conductors of length 0.8 m, carrying current of 15.8 A and 11 A respectively. If they are placed 0.2 m apart, what is the value 106 F, where F is the magnitude of the force in
When a guitar string is sounded along with a 449 Hz tuning fork, a beat frequency of 5.00 Hz is heard. When the same string is sounded along with a 448 Hz tuning fork, the beat frequency is 6.00 Hz
At t=0, the block is moving in the positive direction of the axis, with a speed of 3.0 m/s. what are its (a) speed and (b) direction of travel at t=11 s?
Express the total force exerted on the tower by the three cables in terms of components.
A 0.250 kg block on a vertical spring with a spring constant of 5.00 x 103 N/m is pushed downward, compressing the spring 0.100 m. When released, the block leaves the spring and travels upward vert
Determine the work done on the object by this force as it moves in a straight line from the origin to vector r =(12.0 i hat + 22.0 j hat) m.
Find the displacement of a simple harmonic wave of amplitude 9.60 m at t = 0.71 s. Assume that the wave number is 2.34 m -1, the angular frequency is 2.88 rad/s.
A book with a mass of 2.0kg is held in equilibrium on a board with a slope of 60 degrees by a static frictional force. what is the frictional force exerted on the book?
A 1500 {rm kg} car skids to a halt on a wet road where mu_k = 0.50. How fast was the car traveling if it leaves 66-{rm m}-long skid marks?
River Pascal with a volume flow rate of 5.0×105 joins with River Archimedes, which carries 1.09×106 , to form the Bernoulli River. The Bernoulli River is 170 wide and 30 deep. What is t
A particle initially located at the origin (x=0, y=0) has an acceleration ax =2 m/s2, and ay = 3 m/s2. Its initial velocity is vx = 5 m/s. Find:
A rightward force of 302 n is applied to a 28.9 kg crate to accelerate it across the floor. Determine the acceleration of the crate.
What's the advantage of launching space vehicles from high flying aircraft instead of from the ground?
The position of a mass M on a spring of constant k is represented by the formula x(t) = [0.60sin(2.5t+1)]m. Find the amplitude and angular frequency of the motion.
A grindstone has a moment of inertia I=10kg2. Starting from rest, we accelerate it to an angular velocity of 100rad/s. What is the resulting magnitude of the grindstone's angular momentum L?