A solid sphere starts from rest and rolls down a slope that is 6.4 m long. If its speed at the bottom of the slope is 5.3 m/s, what is the angle of the slope? O 21° O 18° O 31° O cannot be calculated without knowing the mass and radius of the sphere Ⓒ 12°

Find the angular momentum (in kg · m2/s) of Saturn in its orbit around the Sun. - The mass of Saturn is 5.680 ✕ 1026 kg, the orbital radius is 1.427 ✕ 109 km and the orbital period is 29.5 y.   Compare this angular momentum with the angular momentum of Saturn on its axis. - The radius of Saturn is 6.027 ✕ 104 km and the rotation period is 10.66 h.

The mass of an electron is 9.0 x 10-31 kg. It revolves around the    nucleus of an atom in a circular orbit of radius 4.5 m, with a speed of    8.0 x 105 m/s. What is the angular momentum of an electron?

A circular disc of mass M and radius R is rotating about its axis with angular speed ω1 . If another stationary disc having radius R/2 and same mass M is droped co-axially on to the rotating disc. Gradually both discs attain constant angular speed ω2. The energy lost in the process is p% of the initial energy. Value of p is

A particle is experiencing a uniform circular motion. Find the angular momentum? R= 5i +6j V= -3i + 4j M= 6kg

A snake of mass m = 1 kg and length L = 9 m is resting on a scale. At t = (), the snake charmer begin to play his flute and the snake begins to rise up with constant velocity v = 5.2 m/s. 888 v What is the reading on the scale (in kg) at t = 0)?

In an experiment, it is necessary to calculate the angular moment of a disk with an M-mass R radius rotating at an angular speed according to an axis perpendicular to the disk surface passing through the center of mass. The values are as follows;M=(1.09+-0.02)kg R=(0.340+-0.004)mw=(2.16+-0.5)rad/s Calculate the average of the angular momentum of the disk and the uncertainty in the average (error) to express the measurement result.

An asteroid has a mass of m = 2.6 x 106 kg and is approaching Earth. When the asteroid is exactly 3 radii away from the Earth's centre,  it's speed relative to the Earth's centre is u = 8.7 x 103 ms-1. The asteroid then falls to the Earth's surface, but remains intact without dissipating any energy as it passes through the Earth's atmosphere. If the rotation of the asteroid and the Earth is ignored, what is the kinetic energy of the asteroid just before it hits the ground?

A 1500-kg satellite orbits a planet in a circular orbit of radius 6.2 × 106 m. What is the angular momentum, in kg m2/s, of the satellite in its orbit around the planet if the satellite completes one orbit every 1.5 × 104 s?

Under some circumstances, a star can collapse into an extremely dense object made mostly of neutrons and called a neutron star. A star with a of mass of 2.0x1032 kg and radius 7.0x108 m is initially rotating at a rate of once every 30 days. The star collapses into a neutron star with the same mass but a new radius of 16,000 m. What is the angular speed of the star? (Give your answer in rotations per second.) Assume the star is a solid sphere: Isphere = 2/5 MR2.   The Crab Nebula (shown below) formed from a nearby supernova (6000 light years away). Chinese astronomers observed the event in the year 1054 and since that time the nebula has been expanding into what it appears like today. The Crab Pulsar is a neutron star at the center of the nebula and the remains of the original supernova.