Assume friction is negligible. Three identical stones are thrown from the roof o

Question

Assume friction is negligible. Three identical stones are thrown from the roof of a building with the same initial speed vo. One is thrown at angle ? above the horizontal; one is thrown at angle ? below the horizontal; the third is thrown outward along the horizontal. Which statement is true about each of the following quantities:

- vf, the speed with which the stones hit the ground
- x, the distance the stones hit the ground from the base of the building
- t, the time the stones take to hit the ground
1 The t's are different, but all the vf's and x's are the same The t's and x's are all different, but all the vf's are the same The vf's and t's are different, but all the x's are the same The vf's and x's are different, but all the t's are the same The vf's are different, but all the t's and x's are the same They have different x's, but all the vf's and t's are the same They all have the same vf, t and x 1 The t's are different, but all the vf's and x's are the same The t's and x's are all different, but all the vf's are the same The vf's and t's are different, but all the x's are the same The vf's and x's are different, but all the t's are the same The vf's are different, but all the t's and x's are the same They have different x's, but all the vf's and t's are the same They all have the same vf, t and x 1 The t's are different, but all the vf's and x's are the same The t's and x's are all different, but all the vf's are the same The vf's and t's are different, but all the x's are the same The vf's and x's are different, but all the t's are the same The vf's are different, but all the t's and x's are the same They have different x's, but all the vf's and t's are the same They all have the same vf, t and x

Explanation / Answer

a) they have all different vf, t, and x it would take too much time to prove this here, but see this graph for different x for three trajectories with equal v0 and different angles.

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