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A 925 N crate is being pulled across a level floor by a force F of 325 N at an angle of 25° above the horizontal. The coefficient of kinetic friction between the crate and the floor is 0.25. Fin
The roof of a building, 30.0 m above rge ground. How long does it take the the stone to reach the ground? What is the speed of the stone at impact?
Find the magnitude of the force exerted by the left pillar when a 90.0kg diver stands at the far end of the board.
Assume a typical hummingbird has a lifespan of 4.0 years and an average heart rate of 1300 beats per minute. (a) Calculate the number of times a hummingbird's heart beats in its life, and express it
The object falls freely for 4.64 m in the first second. What is the magnitude of the acceleration due to gravity on the planet?
A certain pendulum clock that works perfectly well on Earth is taken to the moon, where g=1.63m/s2. The acceleration due to gravity is 9.81 m/s2. The clock is started at 12:00 am and runs for 24 h
After a day of testing race cars, you decide to take your own 1580 kg car onto the test track. While moving down the track at 10.0 m/s, you uniformly accelerate to 28.0 m/s in 10 s. What is the ave
A cardinal (Richmondena cardinalis) of mass 3.80×10-2 and a baseball of mass 0.144 have the same kinetic energy. What is the ratio of the cardinal's magnitude of momentum to the magnitude of t
Let: ke = 8.98755 × 109 N · m2/C2 . What is the magnitude of the electric field 2.3 cm from the center of the surfaces?
Find its velocity at the end of this time interval. Next, assume it moves with simple harmonic motion for 3.50 s and x = 0 is its equilibrium position.
A plane flying at an altitude of 400m drops a sack containing 10 kg of ice at 0C. How much ice melts in the process? hint: 100% of the energy is used to melt the ice.
It moves at constant speed. At time t2=5s, its acceleration is (4m/s^2)i + (-6m/s^2)j. what is the radius of the path taken by the particle?
A mass of 0.53 kg attached to a vertical spring stretches the spring 37 cm from its original equilibrium position. The acceleration of gravity is 9.81 m/s2 . What is the spring constant?
A 0.75m diameter solid sphere can be rotated about an axis through its center by a torque of 11.5 m*N which accelerates it uniformly from rest through a total of 180 revolutions in 16.0 s. What is
Four identical particles each have charge 0.1 μC and mass 0.03 kg. They are released from rest at the vertices of a square of side 0.33 m. How fast is each charge moving when their distances from
A row of six 1.0 N wooden blocks is being pushed across a tabletop at a constant speed by a toy tractor that exerts a force of 1.3 N on the row. What is the coefficient of kinetic friction between
Three equal point charges, each with charge 1.55 mu C, are placed at the vertices of an equilateral triangle whose sides are of length 0.300 m. What is the electric potential energy U of the system?
A small block of mass m=0.032kg can slide along a frictionless loop-the-loop, with the loop radius R=12cm. The block is released from rest at point P, at height h=5R above the bottom of the loop. Ho
A uniform 5.8 m tall aluminum ladder is leaning against a frictionless vertical wall. The ladder has a weight of 252 N. The ladder slips when it makes a 56 degree angle with the horizontal floor. D
What is the stopping potential if the intensity of the light is doubled?
An anchor holding a boat stationary on a river forms a 30 degree angle with the river bottom. The anchor line is 100 meters long. Assuming the river has a uniform depth, how deep is the river direct
The magnitudes of F1 and F2 are F1=45.0 newtons and F2=80 newtons. Using a scale drawing and the graphical technique, determine (a) the magnitude of F3.
A small ball of mass 51 g is suspended from a string of length 89 cm and whirled in a circle lying in the horizontal plane. If the string makes an angle of 31degrees with the vertical, ?nd the cent
Maricruz slides a 68 kg crate, m, up an inclined ramp 2.0 m long and attached to a platform 1.0 m above floor level. A 415 N force, F, parallel to the ramp, is needed to slide the crate up the ramp
Find the flare's maximum height if it is fired on the level salt flats of Utah. Find the distance from its firing point to its landing point if it is fired on the level salt flats of Utah.