Initial speed, v₁ = 15 m/s
Final speed, v₂ = 25 m/s
Duration of the acceleration, t = 4 s
Calculate the acceleration.
a = (v₂ - v₁)/t
= (25-15 m/s)/(4 s)
= 2.5 m/s²
Answer: 2.5 m/s²
Answer:
The required force is calculated as 79.69 N
Solution:
As per the question:
Angle,
Force, F = 40 N
The angle after the ball is being pulled,
Now,
To calculate the required force:
The tension in the string can be calculated by considering the vertical component:
where
T = Tension in the cord
Now,
Now, after the cord is being pulled, the force exerted is given by:
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