Hui Ying hung two objects x and y on two identical springs. Which one of the following statements correctly explains why spring B is longer than spring A after the objects are hung on them?

(Object x is hung on spring A and object y is on spring B)

1) the mass of object y is more than that of object x.
2) spring A stretches less than spring B for the same amount of mass.
3) the elastic spring force acting on object y is less than that acting on object x.
4) the gravitational force acting on object x is less than that acting on object y.

Ans given is 1. Can the answer be 4? Tia

Hui Ying hung two objects x and y on two identical springs. Which one of the following statements correctly explains why spring B is longer than spring A after the objects are hung on them?

(Object x is hung on spring A and object y is on spring B)

1) the mass of object y is more than that of object x.
2) spring A stretches less than spring B for the same amount of mass.
3) the elastic spring force acting on object y is less than that acting on object x.
4) the gravitational force acting on object x is less than that acting on object y.

Ans given is 1. Can the answer be 4? Tia

Thanks Kangkangteo for your reply.


I used your answer 25min to do a check. After 25min, John will be at the 100m mark of the top side of the square and Peter at the 100m mark of the right hand side of the square.

I think need to add another 1 min so that John can see Peter?

Please help! Thanks in advance!


John and Peter are each standing diagonally across a square building as shown in the diagram below. If John is running at 100m/min and Peter is running at 92m/min in a clockwise direction around the building, and the perimeter of the wall of the building is 800m, at least how long will it take for John to be able to see Peter?

(Not sure how to upload the picture. John is at the top left hand corner of the square and Peter is at the bottom right hand corner of the square)

Please help! Thanks in advance!


John and Peter are each standing diagonally across a square building as shown in the diagram below. If John is running at 100m/min and Peter is running at 92m/min in a clockwise direction around the building, and the perimeter of the wall of the building is 800m, at least how long will it take for John to be able to see Peter?