By the numbers
The Big 3
Live in the Momentum
So much work to do and I do not have the energy. I need some Power!!!
How many physics teachers does it take to screw in a lightbulb?
100
When an object covers equal distance in equal time periods, it must be moving with a constant...
Speed
100
True or false? An object will not start moving unless it is acted on by an unbalanced force.
True
100
Which is a Vector quantity?
1. acceleration
2. momentum
3. speed
4. displacement
2-Momentum
100
The work done in accelerating an object along a frictionless horizontal surface is equal to the change in the object’s
1. momentum
2. velocity
3. potential energy
4. kinetic energy
4-Kinetic Energy
100
The current through a 10-ohm resistor is 1.2 amperes. What is the potential difference across the resistor?
1. 8.3 V
2. 12 V
3. 14 V
4. 120 V
2- 12V
200
What are the Scalers if kinematics?
Distance, speed, and time
200
Momentum= __________ X __________.
Mass, Velocity
200
Which two quantities can be expressed using the same units?
1. energy and force
2. impulse and force
3. momentum and energy
4. impulse and momentum
4- Impulse momentum
200
One watt is equivalent to one
1. N∙m
2. N/m
3. J∙s
4. J/s
4- J/s
200
A potential drop of 50 volts is measured across a 250- ohm resistor. What is the power developed in the resistor?
1. 0.20 W2. 5.0 W
10 W
50 W
10W
300
What does
Vf=?
Vi=?
mean
Final Velocity and Initial
300
The amount of inertia an object has depends on the ________ of the object.
Mass
300
When a 1.0-kilogram cart moving with a speed of 0.50 meter per second on a horizontal surface col- lides with a second 1.0-kilogram cart initially at rest, the carts lock together. What is the speed of the combined carts after the collision? [Neglect friction.]
1. 1.0 m/s
2. 0.50 m/s
3. 0.25 m/s
4. 0 m/s
3-0.25
300
If the speed of a car is doubled, the kinetic energy of the car is
1. quadrupled
2. quartered
3. doubled
4. halved
2-Quartered
300
e resistance of a 60-watt lightbulb operated at 120 volts is approximately
1. 720 ohms
2. 240 ohms
3. 120 ohms
4. 60 ohms
1- 720 ohms
400
When an object is thrown in the air, at the maximum height the velocity is _____
0
400
The weight of a typical high school physics student is closest to
1. 1500 N 2. 600 N 3. 120 N 4. 60 N
600N
400
At the circus, a 100-kilogram clown is red 15 meters per second from a 500-kilogram cannon. What is the recoil speed of the cannon?
1. 75 m/s 2. 15 m/s 3. 3.0 m/s 4. 5.0 m/s
3-3.0m/s
400
As an object falls freely, the kinetic energy of the object
1. decreases
increases
3. remains the same
2-Increases
400
How much total energy is dissipated in 10 seconds in a 4-ohm resistor with a current of 0.50 ampere?
1. 2.5 J
2. 5.0 J
3. 10 J
4. 20 J
4- 20J
500
A man walks 9 km east and then 12 km north. What is the magnitude of his resultant displacement?
500
The diagram below represents two concurrent forces.
Which vector below represents the force that will produce equilibrium with these two forces?
3
500
. Ball A of mass 5.0 kilograms moving at 20 meters per second collides with ball B of unknown mass moving at 10 meters per second in the same direction. After the collision, ball A moves at 10 meters per second and ball B at 15 meters per second, both still in the same direction. What is the mass of ball B?
1. 6.0 kg 2. 2.0 kg 3. 10 kg 4. 12 kg
3-10kg
500
What is the total work done by the boy in pushing the wagon 4.0 meters?
1. 5.0 J
2. 7.5 J3. 120 J
4. 180 J
3- 120J
500
At 20°C, four conducting wires made of di erent ma- terials have the same length and the same diameter. Which wire has the least resistance?
1. aluminum2. gold
3. nichrome4. tungsten
2- GOLD