Answer:
Final velocity, v = 0.28 m/s
Explanation:
Given that,
Mass of the model, 
Speed of the model, 
Mass of another model, 
Initial speed of another model, 
To find,
Final velocity
Solution,
Let V is the final velocity. As both being soft clay, they naturally stick together. It is a case of inelastic collision. Using the conservation of linear momentum to find it as :
V = 0.28 m/s
So, their final velocity is 0.28 m/s. Hence, this is the required solution.
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Answer
Work done will be equal to 1229.296 J
Explanation:
We have given mass of the sister m = 25 kg
Angle between rope and ground 
Force F = 30 N
So horizontal force 
Distance traveled d = 52 m
'We have to find the wok done
Work done is equal to multiplication of horizontal force and distance
So work done 
