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1. What is the angular momentum of a 0.240-kg ball rotating on the end of a thin string in a circle of radius 1.35 m at an angular speed of 15.0 rad/s?
2. A diver can reduce her moment of inertia by a factor of about 4.0 when changing from the straight position to the tuck position. If she makes 2.0 rotations in 1.5 s when in the tuck position, what is her angular speed (rev/s) when in the straight position?
3. A person of mass 72 kg stands at the center of a rotating merry-go-round platform of radius 3.3 mand moment of inertia 950 kg⋅m2 . The platform rotates without friction with angular velocity 0.85 rad/s . The person walks radially to the edge of the platform. a. Calculate the angular velocity when the person reaches the edge. b. Calculate the rotational kinetic energy of the system of platform plus person before the person's walk.
4. Four identical particles of mass m are mounted at equal intervals on a thin rod of length l and mass M, with one mass at each end of the rod. (a. If the system is rotated with angular velocity ω about an axis perpendicular to the rod through one of the end masses, determine the kinetic energy of the system. (b. If the system is rotated with angular velocity ω about an axis perpendicular to the rod through one of the end masses, determine the angular momentum of the system.
You are walking around your neighborhood and you see a child on top of a roof of a building kick a soccer ball. How tall is the building that the child is standing on
The electric potential at a position located a distance of 20.7 mm from a positive point charge of 7.50×10-9C, Calculate the value of the second charge
A glass plate having parallel faces and a refractive index of 1.54 lies at the bottom of a liquid of refractive index 1.62. Compute the angle of refraction of this light in the glass
At what speed would your 4.98 m long car fit in the 4.19 m Part 1 When parked, your car is 4.98 m long. Unfortunately, your garage is only 4.19 m long. How fast would your car have to be moving (in c) for an observer on the ground to find your car..
While moving between a tall tree and a building, a squirrel drops an acorn straight down. A conveniently placed sensor on the ground determines the final velocity of the acorn before it hits the ground is 20m/s. Assuming air resistance is negligib..
Julie has a mass 49kg What is her potential energy when standy on the 6m diving board? what is her kinetic energy just before she hits the water
a 0.210-a current is charging a capacitor that has circular plates 15.8 cm in radius. the plate separation is 4.00 mm.a
A laser light has a wavelength of 670 nanometers and the separation between the two first order diffraction minima is 11 cm. Calculate the slit width and slit separation
A. For the same total current, 40.0 W is delivered when the resistors are connected in parallel. Determine the values of the two resistors
a 194-kg satellite is in circular orbit around the earth and moving at a speed of 5.14 kms. how much work must be done
Two trains, each having a speed of s, are headed at each other on the same straight track. what is the total distance the bird travels
An infinite sheet with a charge density of -5.4 micro-coulombs/m2 is placed on a horizontal surface. A point charge of +6.7 micro-coulombs with a mass
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