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Physics Mini Questions
1) A particle of mass m is dropped at the point (-d, 0) and falls vertically in Earth's gravitational field -gj ^.
(a) What is the expression for the angular momentum of the particle around the z-axis, which points directly out of the page as shown below?
(b) Calculate the torque on the particle around the z-axis.
(c) Is the torque equal to the time rate of change of the angular momentum?
2) A merry-go-round has a radius of 2.0 m and a moment of inertia of 300 kg·m2. A boy of mass 50kg runs tangent to the rim at a speed of 4.0m/s and jumps on. If the merry-go-round is initially at rest, what is the angular velocity after the boy jumps on?
Source charge Q1= -3.00nC located at (0, 5.00mm). Source charge Q2= +2.00nC located at the origin. Find the Magnitude & direction of the net electric field
A force does +130 Joule of work when it acts on a moving object and its direction is in the similar direction as the object's displacement. Find how much work does this force do
A fireworks rocket is launched vertically into the night sky with an initial speed of 43.8 m/s. What is the velocity of the rocket's center of mass before and after the explosion
A railroad car with a mass of 25,000 kg rolls into a second stationary car with a mass of 50,000 kg. How fast was the first car moving before the collision
The electric field everywhere on the surface of a thin, spherical shell of radius 0.790 m is of magnitude 897 N/C and points radically toward the center of the sphere.
question1viscoelasticity a deformation of cross-linked polymeric microgel particle carbopol is described by the
The figure shows a jet engine suspended beneath the wing of an airplane. The weight of the engine is 13200 N and acts asshown in the figure. In flight the engine produces athrust of 59300 N that is parallel to the ground.
The dew point at a location 50 km 20° south of west of a recording station is 4°C higher than at the station. what is the local change in dew point at the station
In a certain time, light travels 4.88 km in a vacuum. During the same time, light travels only 3.19 km in a liquid. What is the refractive index of the liquid
What is the total angular displacement over this period of time?
A cube floats in water. The length of each side 8 cm. Thecube is 3/4 submerged. Find the volume of the water displaced
A car weighing 8800 Newton moves along a level highway with a speed of 100 km/h. The power of the engine at this speed is 78 kilowatt. compute the new speed of the car on the hill
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