Your lab instructor projects a ball horizontally from a lab bench ...

[ETearle]

Your lab instructor projects a ball horizontally from a lab bench that lands on the floor a horizontal distance away. Compared with the time the ball would take if simply dropped vertically from the bench, the time in the air for the projected ball is
 
  1) less.
  2) the same.
  3) greater.
 
  The horizontal distance from the bottom of the bench the ball travels in hitting the floor is equal the ball's initial speed
  4) multiplied by its time in the air.
  5) coupled with its speed of fall.
  6) squared plus its downward speed squared when hitting the floor.

Question 2

A garden hose is held at an angle of 50. Neglecting air resistance, the water will travel exactly the same horizontal distance before returning to the same level if the hose is held at an angle of
 
  1) 40.
  2) 45.
  3) 60.
 
  For maximum range, the hose should be held at
  4) 40.
  5) 45.
  6) 55.
  7) 60.

[aham8f]

Answer to Question 1

Answer: 2, 4

Answer to Question 2

Answer: 1, 5

[ETearle]

Gracias!

[amit]

Excellent