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Answer:g=9.79,A object of mass
at the surface of earth experiences a force
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Explanation:
Let be the mass of earth.
Let be the radius of earth.
Let be the universal gravitational constant.
Given,
Let be the acceleration due to gravity.
Then,
A object of mass at the surface of earth experiences a force
No work is done because the object needs to be moved. The formula for work is Work = Force x Distance.
With the values you've given, only velocity can be found.
Acceleration is rate of change of velocity
d= 250s
t= 17s
a= d/t
=
= 4.7
The displacement distance from my house to school never changes but the time it takes varies due to traffic and it's effects on my vehicle's speed and position in line at stop lights.
Answer:
a
b
Explanation:
Considering question a
From the question we are told that
The weight of the object in air is
The weight of the object in water is
Generally the specific gravity of the object is mathematically represented as
=>
=>
Considering question b
From the question we are told that
The pressure required is
The height is
Generally the pressure require to get the water to the given height is mathematically represented as
Here is the density of water with value
So
=>
Generally the pressure require to pump the water to the given height at the require pressure is mathematically represented as
=>
=>