Answer:
The velocity of the ball when its hit the ground will be 54.22 m/sec
Explanation:
We have given height from which ball is dropped h = 150 m
Acceleration due to gravity 
As the ball is dropped so initial velocity will be zero so u = 0 m/sec
According to third equation of motion we know that 


So the velocity of the ball when its hit the ground will be 54.22 m/sec
Answer:
Explanation:
<u>Kinematics equation for first Object:</u>

but:
The initial velocity is zero

it reach the water at in instant, t1, y(t)=0:


<u>Kinematics equation for the second Object:</u>
The initial velocity is zero

but:

it reach the water at in instant, t2, y(t)=0. If the second object is thrown 1s later, t2=t1-1=1.02s

The velocity is negative, because the object is thrown downwards.
Answ
Explanation:
the adversities that the oak tree will face will add only positive effects to the atmosphere.
primarily the co2 content present in the air will diminish to provide chances for the efficiency of the human being
Answer:
Its acceleration is 1.5
and the distance it has covered is 150 m.
Explanation:
Acceleration is a quantity that indicates the variation in speed of a moving body as time passes. That is, acceleration relates changes in velocity with the time in which they occur.
The average acceleration is defined as the relationship between the variation or change in the speed of a mobile and the time used in said change:

In this case:
- change in speed= final speed - initial speed= 15 m/s - 0 m/s= 15 m/s
- time= 10 s
Replacing:

and solving you get:
<u><em>acceleration= 1.5 </em></u>
<u><em></em></u>
Speed is a quantity that expresses the relationship between the space traveled by an object and the time used for it. This is:

So the distance can be calculated as:
distance= speed* time
In this case:
Replacing:
distance= 15 m/s* 10 s
and solving you get:
<u><em>distance= 150 m</em></u>
<u><em>Its acceleration is 1.5 </em></u>
<u><em> and the distance it has covered is 150 m.</em></u>
Its because of the static electricity.As we rub, the positive and negative charges are acquired by the plastic rod and duster.
If we bring paper bits near them, the charges possessed by the paper bits get attracted towards the charges in plastic rod.