9.) what is work?
10.) what does the odometer of an outomatike measure ?
11) 1) the value of accelerats on due to gravity of the earth is
a.) 9.8m
6.) 9.8m/s^2
C.) 9.8 m/s^3
d.) 8.9 m/s^2
2) g= GM|R^2 here G represents
a) gravity
b)gravitational force
c)gravitational power
d)universal gravitational constant
3) acceleration due to gravity varies with
a)height
b)depth
c)shape of the planet
d)all of these
4) the value of G becomes greater at the poles that at the
a)uniform at all places
b)equator
c)at 23.6 latitude
d)sun
Answers
Answer:
9. Work is defined as a force acting upon an object to cause a displacement. It is expressed as the product of force and displacement in the direction of force. W=F x
10. An odometer or odograph is an instrument used for measuring the distance traveled by a vehicle, such as a bicycle or car. The device may be electronic, mechanical, or a combination of the two (electromechanical).
11. 1. The acceleration due to gravity is 9.8 m/s2
2. universal gravitational constant
3. Acceleration due to gravity is the acceleration gained by an object due to gravitational force. Its SI unit is m/s2. It has both magnitude and direction, hence, it’s a vector quantity. Acceleration due to gravity is represented by g. The standard value of g on the surface of the earth at sea level is 9.8 m/s2
4. Value of effective g increases as we move from equator to north pole because on equator its value is less due to earth's rotational motion and consequent centrifugal force.
Moreover, the equator of the earth is at a larger distance from the centre of the earth as compared to the poles. This is another reason why g is greater on the pole than the equator.