Term
| As an object falls freely in a vacuum (w/o air resistance) its |
|
Definition
|
|
Term
| In the absence of air resistance, the objects fall at a constant |
|
Definition
|
|
Term
| A ball is thrown up and caught when it comes back down. In the absence of air resistance, the speed of the ball when caught would be |
|
Definition
| the same as the speed when first released |
|
|
Term
| Suppose an object is in free fall. Each second the object falls |
|
Definition
| a larger distance than the in the second before. |
|
|
Term
| If you have drop a feather and coin in an air-filled tube, which hits the ground first? |
|
Definition
|
|
Term
| When a basketball player jumps to make a shot, once his feet are off the ground, the jumper's acceleration... |
|
Definition
|
|
Term
| A ball is thrown straight up. The top of its path, the instantaneous speed is |
|
Definition
|
|
Term
| When something falls it accelerates. The acceleration is called the acceleration due to gravity and is symbolized by "g" and it is... |
|
Definition
|
|
Term
| If a free falling object were equipt with a speedometer, its speed reading would increase by about ___ seconds |
|
Definition
|
|
Term
| If a ball were equipt with a speedometer on a planet where the acceleration due to gravity is 23 m/s, the reading on the speedometer would increase each second by |
|
Definition
|
|
Term
| A freely falling object starts from rest and after falling for 6 seconds it will have a speed of about |
|
Definition
|
|
Term
| If you drop a feather and a coin in a vacuum tube which will reach the bottom first? |
|
Definition
| neither- they will land at the same time |
|
|
Term
| When you drop an object you can assume that the _________ of the object is zero when using kinematics equations. |
|
Definition
|
|
Term
| Acceleration is defined as a a change in |
|
Definition
|
|
Term
| Suppose that a car changes from 35 m/s to 40 m/s in one second and from 40m/s to 45 m/s in the second second... what is the accleration |
|
Definition
|
|
Term
| the horizontal component of a projectile's velocity is independent of |
|
Definition
|
|
Term
| a ball is launched horizontally in and hits the ground in .8 seconds. If it had been launched with a much higher speed in the same direction, it would have hit the ground in... |
|
Definition
|
|
Term
| The time the projectile is in the air is called |
|
Definition
|
|
Term
In the absence of air friction, the horizontal component of a projectile's velocity doesnt change as the projectile moves
Sometimes, Always, or Never true? |
|
Definition
|
|
Term
| A cannonball is launched from the ground at an angle of 30 degrees above the horizontal and a speed of 30 m/s. Ideally (no air resistance) the ball will land on the ground with a speed of |
|
Definition
|
|
Term
In the absence of air friction, the vertical component of a projectile's velocity doesnt change as the projectile moves
sometimes, always, or never true? |
|
Definition
|
|
Term
| What is an example of something that is not a projectile? |
|
Definition
| a cannonball rolling down a hill |
|
|
Term
| What angle produces the same distance as 75 degrees? |
|
Definition
|
|
Term
| the highest position the projectile reaches is known as its |
|
Definition
|
|
Term
| A ball is thrown up into the air and at the top the velocity is entirely |
|
Definition
|
|
Term
| At the instant a ball is thrown horizontally, another ball is dropped at the same height. Which ball hits the ground first? |
|
Definition
|
|
Term
| A cannonball is launched horizontally from a tower. If the cannonball has a velocity of 60 m/s, where will it be in 1 second |
|
Definition
|
|
Term
| at what angle will the projectile go the furthest? |
|
Definition
|
|
Term
| At what part of the path does a projectile have a minimum speed? |
|
Definition
|
|
Term
| the horizontal distance a projectile travels is also known as its |
|
Definition
|
|
Term
| If a projectile is launched at an angle the shape of its trajectory will look like a |
|
Definition
|
|
Term
| The law of inertia state that an object |
|
Definition
-will continue moving unless acted upon
-will continue moving in a straight line unless acted upon
-will be at rest unless acted upon |
|
|
Term
| the law of inertia applies |
|
Definition
| to nonmoving and moving objects |
|
|
Term
| a sheet of paper wont topple a container of milk because the milk carton has |
|
Definition
|
|
Term
| One object has twice as much mass as another and the first object also has twice as much |
|
Definition
|
|
Term
| Compared to its weight on earth, the WEIGHT of a 10 kg object on the moon will be |
|
Definition
|
|
Term
| Compared to its weight on earth, the MASS of a 10 kg object on the moon will be |
|
Definition
|
|
Term
| the mass of a sheep that weighs 110N is (? kg) |
|
Definition
|
|
Term
| An object following a straight-line path at a constant path at a constant speed has ___ acceleration |
|
Definition
|
|
Term
| A girl whose weight is 500 N hangs from the middle of a bar supported by two vertical strands of rope. What is the tension in each strand? |
|
Definition
|
|
Term
| Friction Force is a force that always acts |
|
Definition
| opposite to an object's motion |
|
|
Term
| Which has more mass a kg of feathers or a kg of iron |
|
Definition
|
|
Term
| An object on Earth is 30 N and an object on the moon is 30 N. Which has the greater mass? |
|
Definition
|
|
Term
| When an object reaches terminal velocity, its acceleration is |
|
Definition
|
|
Term
| Suppose a force of friction of an object on a level surface is 25 N. The applied force needed to accelerate the object should be |
|
Definition
|
|
Term
| A book weighs 4 . When held at rest in your hands, the net force on the book is |
|
Definition
|
|
Term
| An apple weighs 1 N. The Net Force (total force) on the apple when it is in free fall is |
|
Definition
|
|
Term
| If you pull horizontally on a desk with a force of 250 N causing the desk to move at a constant velocity, the friction force must be |
|
Definition
|
|
Term
| A Net Force on a cart doubles, what happens to its acceleration? |
|
Definition
|
|
Term
|
Definition
|
|
