Use the following figure to answer the question :

-A rock is thrown upward at 50 degrees with respect to the horizontal.As it rises,neglecting air drag,its vertical component of velocity
A)increases.
B)remains unchanged.
C)decreases.

Question

Use the following figure to answer the question :

-A rock is thrown upward at 50 degrees with respect to the horizontal.As it rises,neglecting air drag,its vertical component of velocity
A)increases. 
B)remains unchanged. 
C)decreases.

Quizplus · Accepted Answer

As the rock is thrown upward at an angle of 50 degrees, it initially has a vertical component of velocity which is equal to its initial velocity times the sine of 50 degrees. As it rises, due to the acceleration due to gravity, the vertical component of velocity decreases until it reaches zero at the highest point of its trajectory. Therefore, the correct choice is C, which states that the vertical component of velocity decreases.

Use the Following Figure to Answer the Question