Unit 1
What are the two types of motion graphs?
Position (d) vs. Time (t)
Velocity (v) vs. Time (t)
What is Newton's first law?
An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
What is Energy?
Energy is the ability to do work or the ability to create force
What differs a series circuit from a parallel circuit?
In a parallel circuit, there is multiple paths throughout the circuit and in a series circuit, there is only one path throughout the circuit.
What are the five behaviors of light?
Reflection, Refraction, Diffraction, Interference, and Polarization
True or False. A straight, diagonal line on a position-time graph is representative of an object with a constant velocity.
True
A box is pushed toward the right across a classroom floor. The force of friction on the box is directed toward the:
The left
If a force of 100N was exerted on an object and no work was done, the object must have...
Remained motionless
What are three ways to destroy a magnet?
1. Dropping it
2. Heating it
3. Exposing it to another magnetic field
Is a concave lense (real or virtual), (upright or inverted), (magnified or reduced)?
A concave lense is virtual, upright, and reduced.
What does a velocity-time graph look like when an object is at rest?
The graph will have a line with a zero slope
What are three examples of torque?
Seesaws, Wrenches, Pendulum, Gyroscopes, Parachutes, and Riding a Bike are a few main examples
When a golf club hits a golf ball, the change in momentum of the ball is _____ the change in momentum of the club head.
Greater than
What two things does an electric field depend on?
2. Distance between them (meters)
Define Fission and Fusion and give an example of each
Fission is when a nucleus splits into 2. (ex: power plant)
Fusion is when 2 nuclei combine or fuse into 1 bigger nucleus (ex: sun and stars)
A car moves 65 km due east, then 45 km due west. What distance has the car traveled? What is the car’s displacement?
The car has traveled 110 kilometers and its displacement is 20 kilometers East
You and a friend each have a mass of 60kg and are sitting 20 centimeters apart. What is the gravitational force between the two of you?
6.0 x 10-6 N
What is the momentum of a 124 g baseball traveling at +40 m/s?
4.96 kg x m/s
How many 6 ohm resistors in parallel would it take to make a resistance of 2 ohm?
3 resistors
The focal point is located -10.0 cm from a concave lens. An object is placed 15 cm from the lens. Determine the image distance and height if the object is 3.5 cm tall.
The image distance is -6 cm and the object height is 3.5 cm
Bob is driving along at 60 km/hr while talking to his friend Susan on his phone. He suddenly notices a red light. If it takes him 0.75 seconds to react, how many meters will the car travel before he hits the brakes?
12.5 m
If you have a mass of 55 kg, calculate the force of gravity you feel from the moon when standing on the moon’s surface. The mass of the moon is 7.4 x 1022 kg, and the radius of the moon is 1.74 x 106 m.
89.66 N
A heat engine has a hot reservoir with a temperature of 25.0°C and a cold reservoir with a temperature of 7.0°C. Find the maximum possible efficiency for such an engine.
72%
A wire 375 centimeters long is perpendicular to Earth's magnetic field (5 x 10-5). Calculate the force on the wire if the current on the wire is 16 A. (F = BIL)
0.003 N
If half of a 2 kg is converted into energy, how much energy would be produced?
9 x 1016 J