A 2kg ball moves in a circle of radius 10m. It makes 20 revolutions every 4 seconds. What is the... (a) Frequency? (b) Period? (c) Centripetal Acceleration? (d) Centripetal Force? (e) Speed? [10] The mass of the Earth and Moon are 5:98 1024 kg and 7:35 1022 kg respectively. The radius of the Earth and Moon are 6:38 10ºm and 1:74 10°m respectively. Calculate the acceleration due to gravity at the surface of the Earth and Moon. What is the gravitational acceleration 4000km

A 2kg ball moves in a circle of radius 10m. It makes 20 revolutions every 4 seconds. What is the... (a) Frequency? (b) Period? (c) Centripetal Acceleration? (d) Centripetal Force? (e) Speed? [10] The mass of the Earth and Moon are 5:98 1024 kg and 7:35 1022 kg respectively. The radius of the Earth and Moon are 6:38 10ºm and 1:74 10°m respectively. Calculate the acceleration due to gravity at the surface of the Earth and Moon. What is the gravitational acceleration 4000km

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Please answer question 6
A star 2-5 times the mass of the sun and collapsed to a size of the 12 km rotates with a speed of 1.5 rev. per second. (Extremely compact stars of this kind are known as neutron stars. Certain observed steller objects cailed pulsars are believed to belong this category). Will an object placed on its equator remain struck to its surface due to gravity ? (Mass of the sun = 2 x 1050 kg).
10
A String breaks under a tension of 10kg u wt. If a string is used to revolved a mass of 1.2 gm in horizontal circle of radius 50cm, what is maximum speed with which a body can be revolved ? When a body is revolving at maximum speed what is its period? (g=9.8m/3²)
The planet Mars has a satellite, Phobos, which travels in an orbit of radius 9.4 xm with a period of 7 hr 39 min. Calculate the mass of Mars from this information.
(c) A small object was found to drop above the surface of a big planet with no initial velocity and it fell 13.5 m in 3 s. If the radius of the planet is 5.82 x 10° m, calculate the small object's acceleration during the fall and the mass of the big planet.
A satellite is placed in orbit 1.6(106) m above thesurface of the moon. If the mass of the satellite is 3.0(104 ) kg,determine the gravitational force exerted on the satellite bythe moon.
If the radius of earth were to shrink by one percent, its mass remaining the same, the acceleration due to gravity on the earth's surface would
A 700 Kg racing car completes one revolution on a circular track in ( 20 s ). The radius of the track is ( 70 m). Answer the following question: a) What is the direction of friction force that exert on the car by the track? b) calculate the centripetal acceleration of the car. c) calculate the friction force that exert on the car. (  = 3.14 ) (d) If the speed of the car is doubled while the radius remains constant what happens to the centripetal acceleration of the car.
12–125. The car travels around the circular track having a radius of r = 300 m such that when it is at point A it has a velocity of 5 m/s, which is increasing at the rate of i = (0.061) m/s², where t is in seconds. Determine the magnitudes of its velocity and acceleration when it has traveled one-third the way around the track. 12–126. The car travels around the portion of a circular track having a radius of r= 500 ft such that when it is at point A it has a velocity of 2 ft/s, which is increasing at the rate of i = (0.0021) ft/s², where t is in seconds. Determine the magnitudes of its velocity and acceleration when it has traveled three-fourths the way around the track.
Number 38
The first U.S. satellite, the 14-kg Explorer 1, launched in March 1958, was placed in an orbit for nhich the distances from the center of the earth ot perigee and apogee where r, = 6650 km and re= 9920 km. (A.) Find the period (B.)Find the speed at per igee