WorksheetsPhysics Challenge for Grade 9
Total questions: 10
Worksheet time: 5mins
What is the formula for calculating speed?
Speed = Time / Distance
Speed = Distance + Time
Speed = Distance - Time
Speed = Distance / Time
Define Newton's First Law of Motion.
An object will remain at rest or in uniform motion unless acted upon by an external force.
An object will accelerate unless a force is applied.
An object will change direction only if a force is applied.
An object will remain in motion only if it is in a vacuum.
What is the unit of force in the International System of Units?
joule (J)
watt (W)
newton (N)
pascal (Pa)
Explain the concept of kinetic energy.
Kinetic energy is the energy of an object in motion, calculated as KE = 1/2 mv^2.
Kinetic energy is the energy released during a chemical reaction.
Kinetic energy is the energy stored in an object at rest.
Kinetic energy is the energy required to lift an object against gravity.
What is the difference between mass and weight?
Mass and weight are the same thing; they both measure how heavy something is.
Weight is the amount of matter; mass is the force of gravity on that matter.
Mass is the weight of an object; weight is the mass of an object.
Mass is the amount of matter; weight is the force of gravity on that mass.
State the law of conservation of energy.
Energy can be created and destroyed.
Energy can only be created from matter.
Energy is always lost in transformations.
Energy cannot be created or destroyed, only transformed.
How does friction affect motion?
Friction only affects stationary objects.
Friction opposes motion, slowing down or stopping moving objects.
Friction has no effect on motion.
Friction increases the speed of moving objects.
What is the formula for calculating gravitational potential energy?
U = mv^2
U = 1/2 kx^2
U = Fd
U = mgh
Describe the relationship between voltage, current, and resistance.
Voltage is the same as current.
Voltage, current, and resistance are related by Ohm's Law: V = I * R.
Resistance increases with higher current only.
Voltage and resistance are independent of each other.
What is the principle of buoyancy?
An object submerged in a fluid experiences a downward force equal to the weight of the object itself.
Buoyancy is the force that pulls objects down in a fluid.
An object submerged in a fluid experiences an upward buoyant force equal to the weight of the fluid displaced.
An object in a fluid will always sink regardless of its density.
