WorksheetsReview Flashcard in GenSci
Total questions: 20
Worksheet time: 10mins
The shiny surface of a car mirror sends light rays back to the driver’s eyes. What phenomenon is this?
Refraction
Reflection
Diffraction
Interference
Which principle explains why large ships float even though they are made of steel?
Pascal’s principle
Bernoulli’s principle
Newton’s first law
Archimedes’ principle
Which of the following explains why skaters spin faster when they pull their arms inward?
Their mass decreases.
Centripetal force increases.
Angular momentum is conserved.
Friction with the ice decreases.
A submarine rises toward the surface when its buoyant force becomes:
Equal to its weight
Greater than its weight
Less than its weight
Independent of its weight
When a gymnast performs a somersault in mid-air, what type of motion is mainly demonstrated?
Vibrational
Translational
Rectilinear
Rotational
Which of the following is true about light waves?
They cannot move without a medium
They only move in solids
They are mechanical waves
They can travel through a vacuum
Which situation poses the highest electrical hazard?
Handling wires with damaged insulation
Plugging into a grounded outlet
Using appliances with fuses
Switching off unused devices
Why does a person hear sounds more clearly under water than in air?
Water amplifies sound
Sound travels faster in water than in air
Sound cannot travel in air
Water reduces sound energy
Which of the following physical quantities is considered a vector?
Speed
Mass
Height
Velocity
A spinning wheel on a fixed axle demonstrates what kind of motion?
Angular
Translational
Linear
Vibrational
A hiker walks 10 km north, then 6 km south. What is the hiker’s displacement from the starting point?
4 Km North
4 Km South
16 Km North
16 Km South
Which principle explains the transmission of pressure in hydraulic car brakes?
Archimedes’ principle
Pascal’s principle
Bernoulli’s principle
Pauli Exclusion Principle
A pair of scissors has its fulcrum at the center and the blades on opposite sides. What class of lever does this demonstrate?
First-class lever
Second-class lever
Third-class lever
Compound lever
A metal block floats on mercury but sinks in water. What principle explains this phenomenon?
Inertia
Buoyancy
Cohesion
Elasticity
A mechanic uses a steering wheel to control the direction of a car. Which simple machine is he applying in this situation?
Pulley
Wedge
Wheel and axle
Lever
A rainbow appears after rainfall because of which physical principle?
Interference of light waves only
Polarization of sunlight by raindrops
Diffraction of light waves around raindrops
Refraction, reflection, and dispersion of light in water droplets
Which physics concept explains why we see lightning before hearing thunder?
Sound travels faster than light.
Light travels faster than sound.
Thunder is produced later than lightning.
Air absorbs sound waves.
Which of the following demonstrates the use of rotational motion in daily life?
A book sliding on a table
Ice melting in a glass
Heat conduction through a metal rod
A washing machine spinning clothes dry
Why are seatbelts important in cars, from a physics perspective?
They prevent passengers from moving.
They apply a stopping force over a longer time.
They reduce inertia of passengers.
They increase friction inside the car.
Which of the following best explains why an inclined plane reduces the effort needed to lift a heavy object?
It increases the distance over which the force is applied.
It eliminates friction.
It decreases the object’s weight.
It reduces the object’s mass.
