1. A stone is thrown upwards with an initial velocity of 25 m/s at angle of 30° to the ground a. Show that the vertical component if the velocity at the starting is 12.5 m/s upwards.

sin 30° =

Multiply each side by 25 to cancel the 25 under

(25)· sin 30° =

Multiply everything on the left side.

12.5 = vertical velocity component.

I attached a picture, I hope it helps.

the device is called “ rocket engine”