KINEMATICS
A car accelerates uniformly from rest to 20 m/s in 5 s. Find its acceleration.
What is 4.0 m/s²
The law that explains why you feel pushed back when a car accelerates forward.
What is Newton’s First Law (inertia)?
The principle that energy cannot be created or destroyed in an isolated system.
What is conservation of energy?
Wave type where particle motion is perpendicular to wave direction.
What is a transverse wave?
The basic relation between voltage, current, and resistance. (Law)
What is Ohm’s Law: V = I R?
A ball is thrown straight up at 15 m/s. How long until it reaches its highest point? (g = 9.8)
What is 1.53 s
A 5 kg object is pulled with 20 N (no friction). What is its acceleration?
What is 4.0 m/s²?
A 2 kg object is dropped from 5.0 m. What is its gravitational potential energy at the start? (g = 9.8)
What is 98 J?
A sound wave travels at 340 m/s with frequency 170 Hz. What is its wavelength?
What is 2.0 m?
A 12 V battery is attached to a 4 Ω resistor. What is the current?
What is 3.0 A?
An object travels at 10 m/s for 8 s. How far does it travel?
What is 80 m?
Name the three forces shown on a free-body diagram for a box sliding down a frictionless incline.
What are weight (mg), normal force (N), and down-slope component mg sinθ?
A spring with k = 200 N/m is compressed 0.10 m. How much elastic potential energy is stored?
What is 1.0 J?
Name the interference when two in-phase waves combine to make a larger amplitude, and when two opposite-phase waves cancel.
What is constructive interference and destructive interference?
What happens to total resistance when you add another resistor in parallel with existing ones?
What is total resistance decreases?
A train travels 100 m at 2 m/s, then 200 m at 4 m/s. What is its average speed for the trip?
What is 3.0 m/s?
Clue: A 10 kg box is pushed with 50 N across a surface with μ = 0.3. What is the net force? (g = 9.8)
What is 20.6 N?
A 4 kg cart moves at 3.0 m/s. What is its kinetic energy, and what speed would give it twice that kinetic energy?
What is 18 J, and 4.24 m/s?
Light strikes a plane mirror with an angle of incidence 30° (measured from the normal). What is the angle of reflection?
What is 30 degrees
A coil experiences a changing magnetic flux and produces an emf. Name the law/phenomenon.
What is Faraday’s Law (electromagnetic induction)?
A car with initial speed 5.0 m/s accelerates at 2.0 m/s² for 6.0 s. What is its displacement?
What is 66 m?
Explain, without calculus, why static friction is usually larger than kinetic friction.
What is because small contact points hook up to each other when at rest (stronger maximum resisting force), while during sliding, the contacts break and reform so average resisting force (kinetic) is lower?
Name one non-mechanical way mechanical energy is lost in a roller coaster (where the energy goes)
What is thermal energy due to friction or energy lost as sound / air resistance?
State the grating equation (no calculus) that gives maxima angles for different wavelengths from a diffraction grating.
What is d sinθ = nλ
A transformer has 200 turns on the primary coil and 50 turns on the secondary coil. If the input voltage is 120 V, what is the output voltage?
What is 30 volts?