Two rocks are thrown horizontally at the same time and from the same height. if the initial speeds of rocks a and b are 10 m/s and 15 m/s, respectively, which statement below is true? you can ignore air friction a) rock a will hit the ground before rock b. b) rock b will hit the ground before rock a. c) rock a and rock b will hit the ground at the same time. d) the answer will depend on the masses of rock a and rock b

The horizontal speed has no effect on how long it flies before it hits the ground ... only how far it goes horizontally before it hits the ground.

Rock A and rock B will hit the ground at the same time. (C)  BUT ... Rock-B had more horizontal speed, so it'll go farther before it hits the ground.

Weirdly ... that means that if you aim a gun horizontally, and drop a bullet from the muzzle at exactly the same time as you shoot the gun, both bullets will hit the ground at the same time.  

where's the following? you gotta add it to know what the choices are

explanation:

graph question answered .. you think better when you are relaxed and happy