Answer: 
Explanation:
Given
mass of ball m=10 kg
It is placed at a height of 150 m
It is dropped from the height and allowed to free fall for 40 m
Velocity acquired by the ball during this fall is given by 
Insert u=0, a=g
Kinetic energy at this instant
Answer:
0.5x35=17.5
Explanation:
You throw 0.5 kg the ball leaves your hand with
A speed of 35
Newton's second law of motion states that the force is equal to the product of the mass and acceleration. It can mathematically be expressed as,
F = m x a
When this equation is transformed to solve for acceleration, this becomes,
a = F / m
The equation suggests that for an object to move, force has to be exerted.
<em>604.8 kg</em>
<em>Hi there ! </em>
<em>d = m/V => m = d×V</em>
<em>V = l×w×h = 10m×12m×4m = 480 m³</em>
<em>m = 1.26kg/m³×480m³ = 604.8 kg</em>
<em>Good luck !</em>
