The force of gravity is an attractive force, whose magnitude is given by
Explanation:
The force of gravity is one of the four fundamental forces of nature (the weakest one). It is an attractive force that is exerted between every object that has mass.
The magnitude of the gravitational force between two objects is given by the equation:
where
:
is the gravitational constant
are the masses of the two objects
r is the separation between them objects
We notice from the equation that:
- The gravitational force is proportional to the product of the masses: so if the masses increase, the force will increase as well
- The gravitational force is inversely proportional to the square of the distance: so if the distance increases, the force will decrease
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Ke=1/2mv^2
Ke= 0.5*30*20^2
Ke= 6000joules
Answer:
E = 62.72 J
Explanation:
Given that,
The mass of a ball, m = 4 kg
The teacher raised the lawn bowling ball to a height of 1.6 meters before
they released it.
We need to find the gravitational potential energy of the ball.
We know that,
E = mgh
Where
g is acceleration due to gravity
So,
E = 4 kg × 9.8 m/s² × 1.6 m
E = 62.72 J
So, the gravitational potential energy of the ball is equal to 62.72 J.
Answer:
The answer is
<h2>90 km</h2>
Explanation:
To find the distance covered by an object given it's velocity and time taken , we use the formula
<h3>distance = velocity × time</h3>
From the question
velocity = 30 km/hr
time = 3 hrs
The distance covered is
distance = 30 × 3
We have the final answer as
<h3>90 km</h3>
Hope this helps you
Answer: Heterogenous mixture
Explanation:
A heterogeneous mixture in which the components of the mixture are not evenly mixed or uniform, allowing one to identify the different constituents of each components and enable the mixture to be separated physically.
Examples of heterogeneous mixtures includes
-- sand and nails
---rice and beans
--- water and oil
Another type of mixture is the homogeneous mixture in which all the components are evenly mixed causing that each components cannot be visible with the eye and therefore separated chemically.