Trang chủ » blog » Midterm Flashcards

Midterm Flashcards

terminus

As an object falls freely in a vacuum (w/o air resistance) its
definition

velocity increases
term

In the absence of air resistance, the objects fall at a constant
Definition

acceleration
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
terminus

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

the coin
terminus

When a basketball player jumps to make a shot, once his feet are off the ground, the jumper’s acceleration…
definition

is “g”. No more or les
term

A ball is thrown straight up. The top of its path, the instantaneous speed is
definition

0 m/s
term

When something falls it accelerates. The acceleration is called the acceleration due to gravity and is symbolized by “g” and it is…
definition

9.8 m/s
term

If a free falling object were equipt with a speedometer, its speed reading would increase by about ___ seconds
definition

10
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

23 m/s
term

A freely falling object starts from rest and after falling for 6 seconds it will have a speed of about
definition

60 m/s
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
condition

When you drop an object you can assume that the _________ of the object is zero when using kinematics equations.
definition

initial velocity
term

Acceleration is defined as a a change in
definition

velocity divided by time
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

5 m/hxs
term

the horizontal component of a projectile’s velocity is independent of
definition

the vertical component
condition

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

.8 seconds
terminus

The time the projectile is in the air is called
definition

flight time
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

Always true
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

30 m/s
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

Always
terminus

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

15 degrees
terminus

the highest position the projectile reaches is known as its
definition

maximum height
term

A ball is thrown up into the air and at the top the velocity is entirely
definition

horizontal
Term

At the instant a ball is thrown horizontally, another ball is dropped at the same height. Which ball hits the ground first?
definition

hits at the same time
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

60 m down range
term

at what angle will the projectile go the furthest?
definition

45 degrees
condition

At what part of the path does a projectile have a minimum speed?
definition

at the top of its path
term

the horizontal distance a projectile travels is also known as its
definition

range
term

If a projectile is launched at an angle the shape of its trajectory will look like a
definition

full parabola
condition

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

inertia
term

One object has twice as much mass as another and the first object also has twice as much
definition

inertia
condition

Compared to its weight on earth, the WEIGHT of a 10 kg object on the moon will be
definition

less
term

Compared to its weight on earth, the MASS of a 10 kg object on the moon will be
definition

the same
term

the mass of a sheep that weighs 110N is (? kg)
definition

11 kg
terminus

An object following a straight-line path at a constant path at a constant speed has ___ acceleration
definition

zero
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

250 N
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

both have the same
term

An object on Earth is 30 N and an object on the moon is 30 N. Which has the greater mass?
definition

moon one
condition

When an object reaches terminal velocity, its acceleration is
definition

0 m/s
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

more than 25 N
term

A book weighs 4. When held at rest in your hands, the net force on the book is
definition

0 N
term

An apple weighs 1 N. The Net Force (total force) on the apple when it is in free fall is
definition

1 N
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

equal to 250 N
Term

A Net Force on a cart doubles, what happens to its acceleration?
definition

It doubles too.
term

Net Force=
definition

total force
beginning : https://leowiki.com
Category : Economy

Post navigation

Leave a Comment

Trả lời

Email của bạn sẽ không được hiển thị công khai.