IV. Motion in a Plane Flash Cards

1. Direction of the car's: acceleration? force? velocity?

a - 

F -

v -  

 

2. A 1.50-kilogram 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 = _____

 

  • In uniform circular motion, the centripetal force and centripetal acceleration is directed toward the ______ of the circular path and is perpendicular to the tangential ______ .

  • When one object exerts a force on a second, the second exerts a force on the first that is ____ in magnitude and ____ in direction.

    •

 

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 hammer-throw event swings a 7.0-kilogram 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