IV. Motion in a Plane Flash Cards
1. Direction of the car's: acceleration? force? velocity? 
a  F  v 

2. A 1.50kilogram cart travels in a horizontal
circle of radius 2.40 meters at a constant speed of 4.00 meters per second.
Calculate the time required for the cart to make one complete revolution. 

A golf ball leaves a golf club with an initial velocity of 40.0 meters per second at an angle of 40.^{o} with the horizontal.
62 What is the vertical component of the golf ball’s initial velocity? 
Motion in a Plane Flash Cards
The diagram below shows a projectile moving
with speed v at the top of its trajectory. Which vector best represents the acceleration of the projectile in the position shown? 

The inertia of an object is directly proportional to its _______. An object remains at rest or moves with constant velocity, unless acted upon by an unbalanced force.


When the net force on a system is zero, the system is in equilibrium. velocity is ________ and a = _____




Motion in a Plane Flash Cards
The speed at which the launcher fires tennis balls is constant, but the angle between the launcher and the horizontal can be varied. As the angle is decreased from 45° to 30.°, the range of the tennis balls 1) decreases 2) increases 3) remains the same 

The path of a projectile fired at a 30° angle
to the
horizontal is best described as 1 parabolic 2 linear 3 circular 4 hyperbolic 

A red ball and a green ball are simultaneously
thrown horizontally from the same height. The red ball has an initial speed of
40. m/s and the green ball has an initial speed of 20. m/s. Compared to the time it takes the red ball to reach the ground, the time
it takes the green ball to reach the ground will be (1) the same (3) half as much (2) twice as much (4) four times as much 

A baseball player throws a ball horizontally.
What happens to each of these quantities? Answer either increase, decrease or same vertical speed? ___ horizontal speed? ___ horizontal acceleration? ___ vertical acceleration? ___. 
vertical speed?
horizontal speed?
horizontal acceleration? vertical acceleration? . 
An athlete in a hammerthrow event swings a
7.0kilogram hammer in a horizontal circle at a
constant speed of 12 meters per second. The radius of the hammer's path is
2.0 meters.
At the position shown, the centripetal force acting on the hammer is
directed toward point
(1) A
(2) B (3) C (4) D 