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1) The radius of the earth at the equator is 6.4 x 10^6 m. Assume that the earth is spherical.
a) determine the instantaneous velocity of a point at the equator
b) determine the centripetal acceleration of a point at the equator
b) 3.4 x 10^-2 ms-2
1) Describe the gravitational field as it: (include diagram to aid answer)
a) exists within the room within you're sitting
b) as it exists around a planet such as the Earth
2) Outline how the Law of Universal Gravitation can be used to calculate the acceleration due to gravity at the Earth's surface
3) The gravitational field vector g has an average value on the surface of Earth of 9.8Nk-1 or ms-2. Show that the two alternative units quoted are equivalent
a) calculate the value of N, the normal contact force
b) calculate the speed at which the car is travelling
The answers are below but i couldn't figure out to get to them.
a) 9.5x10^3 N
a) the radius of the circle traced
b) the tension of the string
c) the period of the motion
a. 20 Kg
b. 50 Kg
c. 15 Kg
d. 30 Kg