Balanced And Unbalanced Forces
Force and Intertia
Electromagnetic Spectrum
Electromagnetic vs Mechanical
Lenses
100
Changes of motion are caused by
unbalanced forces
100
A 600g basketball, a 500g football, a 150g baseball, and a 50g yo-yo: four toys. If you had to throw one of the four, which one would take the MOST force to throw?
A)baseball
B)basketball
C)football
D)yo-yo
Basketball
100
Burned Becky stayed out in the sun too long and is now suffering from a terrible sunburn. What caused Becky's sunburn?
A)Gamma rays from the sun
B)Ultraviolet radiation from the sun
C)Convection currents near the ground
D)Infrared radiation reflecting off the ground
Ultraviolet radiation from the sun
100
Sound waves with a large distance between A and B would be sound waves that have a large ________ and produce loud sounds.
A)amplitude
B)frequency
C)pitch
D)resonance
amplitude
100
__________ lenses refract light rays in toward a central point. When this lens is held close to your eye, the image is magnified and right side up.
A)Concave
B)Convex
C)Prismatic
D)Refractive
?
200
Julio hit a baseball. What caused the ball to change direction at the time of impact?
force of his swing
200
Mutt and Jeff are running along a path each pushing a cart loaded with rocks. If Mutt's wagon has a mass two times greater than Jeff's and they want to stay together, arriving at their destination at the same time. In order for them to arrive together, what must happen?
A)Jeff should slow down so Mutt can catch up.
B) Mutt must use half as much force to push his cart.
C)Mutt must use twice as much force to push his cart.
D)Mutt and Jeff will use the same force, but Mutt will take bigger steps.
Mutt must use twice as much force to push his cart.
200
- AM Radio Waves
- Ultraviolet Light
- X Rays
- Visible Light
What is true for ALL of the examples of electromagnetic waves?
A)They all move at the same speed in a vacuum.
B)They all have the same wavelength.
C)They all have the same frequency.
D)They all have the same energy.
They all move at the same speed in a vacuum.
200
A boat moves up and down as water waves pass under the boat. If the amplitude of the wave gets bigger, then
A)the boat will rise up higher.
B)the boat will not rise up as high.
C)the boat will go up and down more often.
D)the boat will continue to move the same way.
the boat will rise up higher.
200
If you put a pencil in a cup of water, it looks as if it is broken and larger in the water. This is because light waves
A)can reflect off the surface.B
)are absorbed instead of reflected.
C)bend when passing from air to water.
D)wrap around a barrier, like the pencil.
bend when passing from air to water.
300
A train rolls to a stop along a horizontal track without the conductor applying the brakes. Why does this occur?
The opposing force of friction stopped the train.
300
If you know the amount of the unbalanced force acting upon an object and the mass of the object, using Newton's 2nd Law what could you calculate about the object?
acceleration
300
As you tune your radio to a higher frequency, from 88.5 FM to 103.3 FM, the wavelength of the wave that you are tuning in
A)increases.
B)decreases.
C)remains the same.
D)randomly changes.
decreases
300
A mechanical wave may be described as a disturbance that is transported through a medium via the mechanism of particle-to-particle interaction. Which of these is not classified as a mechanical wave?
A)earthquake
B)light
C)sound
D)water
light
300
Sara is using a magnifying glass to closely examine her stamp collection. Why type of lens is found in a magnifying glass?
A)bifocal
B)concave
C)convex
D)prismatic
convex lens
400
Net force is the total of all forces acting on an object. When a force is balanced and the object does not move, the net force is equal to what:
0 (zero)
400
Joe is the best baseball player in the world. He can throw a baseball faster than anyone. If the mass of the baseball was increased by 50%, but he applied the same force as he did to a lighter baseball, which of these would best describe Joe's attitude?
A)Joe would love to use the new ball in future baseball games.
B)Joe would be happy as the new ball would have a faster acceleration.
C)Joe would be unhappy as the new ball would have a slower acceleration.
D)Joe's attitude would not change as there would be no change in the acceleration.
Joe would be unhappy as the new ball would have a slower acceleration.
400
The picture lists light waves from left to right in order of highest to lowest energy. Which region of the electromagnetic spectrum has the longest wavelength?
A)UVB)Gamma Rays
B) Gamma Rays
C)Radio Waves
D)Visible Light
Radio Waves
400
This graph is accurate because
A)mechanical waves cannot travel through a medium.
B)electromagnetic waves cannot travel through a vacuum.
C)electromagnetic waves move faster than mechanical waves.
D)mechanical waves move faster than electromagnetic waves.
electromagnetic waves move faster than mechanical waves.
400
A rubber ducky is placed 20 cm from a thin convex lens with a focal length of 15 cm.
Which statement correctly describes the nature and position of the image formed of the rubber ducky?
A)Real and upright on the side of the lens opposite the rubber ducky.
B)Real and inverted on the side of the lens opposite the rubber ducky.
C)Imaginary and upright on the side of the lens opposite the rubber ducky.
D)Imaginary and inverted on the same side of the lens as the rubber ducky.
Real and inverted on the side of the lens opposite the rubber ducky.
500
A wheelbarrow is experiencing two forces. One is pushing 5 N to the east and the other 5 N in the exact opposite direction. What must be true of the wheelbarrow's motion?
It isn't accelerating.
500
It is almost time for the summer Olympics. The Olympic hammer throw is a throwing event where the object is to throw a heavy metal ball attached to a wire and handle. The name hammer throw comes from an older contest where men threw a sledge hammer. The hammer have different weights, ranging from 16 pounds down to 8 pounds. Imagine there are four hammers to throw: 16, 12, 10, and 8 pounds. If you throw each hammer with the same amount of force, which hammer will move the shortest distance?
A)8 pounds
B)10 pounds
C)12 pounds
D)16 pounds
16 pounds
500
In the visible spectrum, the color of light depends on the frequency. Which statement BEST describes the wavelengths of a certain frequency?
A)A low frequency wave has a long wavelength.
B)A low frequency wave has a short wavelength.
C)A high frequency wave has a wavelength that is not measurable.
D)A high frequency wave and a low frequency wave have the same wavelengths.
A low frequency wave has a long wavelength.
500
The distance shown in the diagram is known as the
A)amplitude.
B)crest.
C)trough.
D)wavelength.
wavelength
500
When light waves pass through the lenses of a pair of glasses, the light waves ______________ .
A)conduct
B)diffract
C)reflect
D)refract
refract