# Shared Flashcard Set

## Details

Trajectory of a Projectile
N/A
22
Physics
12/01/2009

Term
 Why does a bowling ball move across a surface with no acceleration?
Definition
 There is no horizontal force
Term
 without air resistance, why does the horizontal velocity remain constant but the vertical component changes?
Definition
 there is gravitational pull in the vertical component, but not the horizontal
Term
 How does free fall compare with the downward motion of a projectile?
Definition
 They are the same
Term
 If a ball is thrown at a curve and one is thrown horizontally; which strikes the ground first?
Definition
 They strike the same
Term
 How far below an initial straight line will the ball be after one second
Definition
 5 units
Term
 At what angle will you get the largest altitude? range?
Definition
 75 degrees, and 45 degrees
Term
 If the ball's release velocity (upwards) is 20m/s what will the velocity be when caught?
Definition
 20m/s
Term
 If you throw a ball horizontally at initial velocity of 20 m/s what will the velocity be when caught at the other end of the plane?
Definition
 20m/s (same)
Term
 Does speed change if air resistance is a factor?
Definition
 Yes; decreases
Term
 When no horizontal force is acting on the projectile, the horizontal force remains ___
Definition
 constant
Term
 the vertical component changes with ___
Definition
 time
Term
 the horizontal and vertical components are ____ of each other
Definition
 independent
Term
 the ball's horizontal component is ___
Definition
 constant
Term
 the moving object moves the same horizontal distance in ____ time
Definition
 equal
Term
 there is ____ forces acting on the horizontal component
Definition
 none
Term
 Gravity only acts ____
Definition
 downward
Term
 the only acceleration of the ball is in the ______direction
Definition
 downward
Term
 A ball launched at a curve and a ball launched straight, will land _____
Definition
 at the same time
Term
 the path of a projectile with the only acceleration in the vertical direction with a constant horizontal is ____
Definition
 parabolic
Term
 to find the distance of a ball's location from the non-gravity line, use this equation
Definition
 d=5t^2
Term
 At the top of the parabola, the vertical component = ___
Definition
Term
 What number must two equi-distant angles add up to?
Definition
 90 degrees
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