Physical science chapter 2
2 N
A 10 N falling object encounters 8 N of air resistance. The bet force on it is
Either away from you or toward you
A Doppler effect occurs when a source of sound moves
1500 N
A car has a mass of 100 kg and accelerates 1.5 m/s squared what is the magnitude of the force exerted on the car
Neither acceleration nor speed
A falling object that has reached its terminal speed continues to gain
500 N
A person is attracted down word in the center of earth by a 500 N gravitational force the force of attraction of earth toward the person is
Ball against the bat
A player hits the ball with the bat if one part of the interaction is the back against the wall the other is the
The box has inertia
A sheet of paper can be pulled from Beneath a box of cerealwithout toppling it if the paper is jerk quickly. this best demonstrates that
A wave reflects upon itself
A standing wave can occur when
Both time and space
A wave viberation
A single reaction
Action reaction forces compromise the parts of
Remains constant
After a ball tossed up word leaves your hand the force of gravity on it
Arrows push in the bow stings
An archer shoots an arrow. If the action force is the bowstring on the arrow, the reaction is the
Without the need of a force
An object in motion tends to remain in motion
Longitudinal waves
Compression and rare fraction are characteristics of
And you move at the same horizontal speed before during and after you jump
Earth moves about 30 km/s relative to the sun when you jump aboard in front of the wall the wall doesn't slam into you at 30 km/s because the wall
20hz to 20000hz
Humans range of hearing
3000 N
I told truck exerts a force of 6000 N on a car that accelerates at 2 m/s squared the mass of the car must be
0.05s
If the frequency of a certain wave is 20hz, it's period is
10 m/s squared
If you drop an object it will accelerate downward at a rate of 10 m/s squared if you instead throw it downward it's acceleration in the absence of air resistance will be
The phenomenon of beats results from sound
Interference
Acceleration
Newtons second law directly involves
Steel
Sound travels faster in
Light , water, sound waves
The Doppler affect is characteristics of
The persons body pulling on earth
The attraction of a persons body toward earth is called White be reaction to this force is
Road
The force exerted on the tires of a car to directly accelerated along the road is exerted by the
Zero
The force required to maintain an object at a constant velocity in a free space is equal to
Amplitude
The loudness of a musical sound is a measure of the sound wave's
Transmits the wave
The medium in which a wave travels
Both shape and size and elasticity
The natural frequency of an object depends on its
Zero
The net force on any object moving at a constant velocity is
An echo
The reflection of sound is
Vibrating object
The source of all wave motion is a
The air temperature
The speed of a sound wave in air depends on
Along the direction of wave travel
The vibration of a longitudinal wave move in a direction
Heavier object
Two objects of the same size but unequal weights are dropped from a tall tower taking air resistance into consideration the object to hit the ground first will be the
300 N upward
When a 500 N parachutist opens his chute and experiences 800 N of air resistance, the net force on him is
Constant
When a falling object has reached its terminal velocity, its acceleration is
Decreases
When an object falls through the air and gain velocity, the net force actually
Decreases
When an object falls through the air, as velocity increases its acceleration
Downward and constant
When you toss a coin straight up it moves upward turns around and drops. during this time the acceleration of the coin is
Sound
Which is a longitudinal wave
Follow a straight line path
Whirl a rock at the end of a string and it follows a circular pat. If the string breaks, the rock tends to