The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
Answer:
d. Test the rods one pair at a time in each possible end‑to‑end orientation until finding a pair that repels; the leftover rod is unmagnetized.
Explanation:
Repulsion is the surest test of magnetisation . If two objects repel each other , they must be magnets . If two objects attract each other , they may not be magnets. In later case , one may be non - magnet. So the last test will help us identify the unmagnetised rod.
To Find :
The acceleration of the heavier object.
Solution :
Force of gravitation on lighter object by heavier object is :
Acceleration of lighter object is given by :
.....1)
Now, acceleration of heavier object when separation between them is 25 km :
.....2)
Putting value of m in equation 2, we get :
Therefore, the acceleration of the heavier object is 100 m/s².