61 Physics questions When work is done and a force is transferred which choice describes the movement of the object

QUESTION 1

1. When work is done and a force is transferred which choice describes the movement of the object?
   

   		When work is done and a force is transferred an object must move in the direction of the force.
   		When work is done and a force is transferred an object moves opposite the direction of the force.
   		When work is done and a force is transferred an object does not move.
   		When work is done and a force is transferred an object moves perpendicular to the direction of the force.

3 points

QUESTION 2

1. Which equation would you use to solve the following problem?
   An object is moved 29 meters with a force of 289 N. What is the work done?
   

   		The problem is asking to solve for power; P = W/t
   		The problem is asking to solve for energy; E = J/s
   		The problem is asking to solve for work; W = F x d
   		The problem is asking to solve for time; t = W/P

3 points

QUESTION 3

1. Joe is completing his science homework. He has been calculating how much work was done when moving an object but cannot remember the unit for work. Which of the following is the correct unit for Joe’s calculation?
   

   		Newton
   		Joule
   		Meter
   		Watt

3 points

QUESTION 4

1. Michelle is working on calculating the force used to move an object. She needs to label the correct unit. Which of the following choices should she use?
   

   		Joule
   		Meter
   		Watt
   		Newton

3 points

QUESTION 5

1. Which of the following can you calculate when you know the values for work and time?
   

   		power
   		mass
   		distance
   		force

3 points

QUESTION 6

1. When calculating power what two pieces of information are needed?
   

   		watts and time
   		distance and mass
   		work and mass
   		work and time

3 points

QUESTION 7

1. Lee has been moving a crate that has a mass of 125 kg and required 120 J of work to move. The crate was moved a distance of 20 meters in 30 seconds. What was the power output?
   

   		6.25 W
   		4.16 W
   		6 W
   		4 W

3 points

QUESTION 8

1. Angie is moving a couch with a mass of 48 kg. She moves it in 120 seconds using 240 J of work. What is her power output?
   

   		2 W
   		2.5 W
   		5 W
   		10 W

3 points

QUESTION 9

1. How many classes of levers are there?
   

   		2
   		3
   		1
   		10

3 points

QUESTION 10

1. Which of the following explains why a ramp makes work easier?
   

   		reduces the amount of work needed
   		reduces the amount of resistance force
   		increases the distance over which force is exerted
   		increases effort force

3 points

QUESTION 11

1. Which of the following is something that makes one type of work easier?
   

   		complex machine
   		simple machine
   		mechanical advantage
   		efficiency

3 points

QUESTION 12

1. Which of the following pieces of information are needed to calculate the mechanical advantage of an inclined plane?
   

   		the effort distance and the resistance force
   		the resistance force and height
   		the amount of effort needed to perform the work
   		the effort distance and the resistance distance

3 points

QUESTION 13

1. Which of the following is the correct class of lever for a see-saw?
   

   		third class lever
   		first class lever
   		second class lever

3 points

QUESTION 14

1. Which of the following is part of a vacuum?
   

   		inclined plane
   		block and tackle
   		wedge
   		lever

3 points

QUESTION 15

1. How are distance and force related?
   

   		When distance is increased the amount of force needed will increase.
   		When distance is increased the amount of force needed will remain the same.
   		When distance is increased the amount of force needed will depend on the mass of the object.
   		When distance is increased the amount of force needed will decrease.

3 points

QUESTION 16

1. How is work affected when an object is lifted straight up instead of using a ramp?
   

   		Work will increase.
   		Work will decrease.
   		Work will stay the same.
   		Work will depend on mass of the object.

3 points

QUESTION 17

1. Which of the following describes a knife?
   

   		simple machine
   		increases effort force
   		increases resistance force
   		compound machine

3 points

QUESTION 18

1. Which of the following is a compound machine?
   

   		pry bar
   		ramp
   		car
   		jar lid

3 points

QUESTION 19

1. Which of the following is contained in a bicycle?
   

   		gears and inclined plane
   		inclined planes and screw
   		wheel and axle and screw
   		wheel and axle and inclined plane

3 points

QUESTION 20

1. Which of the following is the reason a lever is used in a shovel?
   

   		a lever is used to decrease effort force
   		a lever is used to decrease resistance force
   		a lever is used to increase resistance force
   		a lever is used to increase the effort force

3 points

QUESTION 21

1. The neck is an example of a simple machine in the human body.
   

   		True
   		False

2 points

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QUESTION 1

1. Which of the following would describe the interaction between two north poles of a magnet?
   

   		attract
   		repel
   		stay unchanged
   		it depends

3 points

QUESTION 2

1. As the magnetic field increases, which of the following also increases?
   

   		domain
   		force
   		pole
   		area

3 points

QUESTION 3

1. One way that a magnet’s domain could become unaligned is which of the following?
   

   		by using it too much
   		by heating it
   		by breaking it
   		by putting it near a magnet that repels it

3 points

QUESTION 4

1. How are atoms in a magnet arranged?
   

   		according to their magnetic poles
   		according to their magnetic force
   		according to their magnetic properties
   		according to their magnetic areas

3 points

QUESTION 5

1. The strength of the magnetic field around a current-carrying wire is determined by which of the following?
   

   		the amount of current in the wire
   		the magnetic domain
   		the magnetic force
   		the direction of the current

3 points

QUESTION 6

1. Which of the following describes a magnet that only has a field when a current is present?
   

   		permanent magnet
   		magnetic domain
   		electromagnet
   		magnetic pole

3 points

QUESTION 7

1. Which of the following is needed to create an electromagnet?
   

   		a motor
   		electrical resistance
   		electric current
   		battery

3 points

QUESTION 8

1. The magnetic field of an electromagnet can be increased by which of the following?
   

   		by making the core bigger
   		by making the core smaller
   		by increasing the magnetic domain
   		by increasing the electric current

3 points

QUESTION 9

1. When there are more coils added to the wire of an electromagnet what happens to the magnetic field?
   

   		The magnetic field increases
   		The magnetic field decreases
   		The magnetic field varies
   		The magnetic field stays the same.

3 points

QUESTION 10

1. A compass aligns with the
   

   		magnetic field of the Earth
   		flow of electricity around it
   		radio waves that surround it
   		true geographical poles of the Earth

3 points

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QUESTION 1

1. Sound waves are created by which of the following?
   

   		vibrations of particles in the air
   		vibrations in your vocal cords
   		vibrations of musical instruments
   		all of the above

3 points

QUESTION 2

1. How are sound waves produced?
   

   		when a vibrating material sends a disturbance through a medium
   		when a sound is reflected off an object and through a medium
   		when a vibration compresses so much that it makes a wave
   		when the temperature of a medium changes such that vibrations are created

3 points

QUESTION 3

1. Sound waves can travel through air, water, a vacuum, and the earth.
   

   		True
   		False

2 points

QUESTION 4

1. Sound enters the ear at the inner ear.
   

   		True
   		False

2 points

QUESTION 5

1. Sound waves with frequencies below 20 hertz are called infrasonic and those with frequencies above 20,000 hertz are called ultrasonic.
   

   		True
   		False

2 points

QUESTION 6

1. Which term is used to describe how high or low a sound is?
   

   		resonance
   		refraction
   		pitch
   		loudness

3 points

QUESTION 7

1. Pitch is related to ______________, while loudness is related to ______________ for a sound wave.
   

   		amplitude, frequency
   		reflection, refraction
   		frequency, amplitude
   		amplitude, energy

3 points

QUESTION 8

1. Which behavior of waves should the designers of concert halls and auditoriums study in order to ensure best sound quality?
   

   		refraction
   		reflection
   		noise
   		rarefaction

3 points

QUESTION 9

1. Multiple reverberations or reflections of sound can interfere with sound quality.
   

   		True
   		False

2 points

QUESTION 10

1. Aircraft noise is the second leading cause of noise pollution.
   

   		True
   		False

2 points

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QUESTION 1

1. Carbon-14 has 6 protons and 8 neutrons; which element has 6 protons and 7 neutrons?
   

   		C-13
   		Si-14
   		C-6

3 points

QUESTION 2

1. Nuclear fission is used for nuclear power plants because it produces which of the following?
   

   		energy
   		alpha particles
   		radiation

3 points

QUESTION 3

1. Nuclear fission is best described as
   

   		joining of two nuclei
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