WorksheetsPhysics Concepts for Grade 7
Total questions: 15
Worksheet time: 8mins
What is Newton's First Law of Motion?
An object will accelerate indefinitely without any force.
An object will change its direction only when a force is applied.
An object will only move if a force is applied continuously.
An object will remain at rest or in uniform motion unless acted upon by an external force.
Explain Newton's Second Law of Motion with an example.
Newton's Second Law states that energy is conserved in a closed system.
Newton's Second Law describes the relationship between velocity and time.
An example of Newton's Second Law is a ball rolling down a hill without any force acting on it.
Newton's Second Law of Motion is F = ma, where F is force, m is mass, and a is acceleration.
What does Newton's Third Law of Motion state?
For every action, there is a proportional reaction.
For every action, there is an equal and opposite reaction.
The force of an object is equal to its mass times its velocity.
An object in motion stays in motion unless acted upon by a force.
Define work in terms of physics.
Work is the product of force and distance in the direction of the force.
Work is the total mass of an object multiplied by its velocity.
Work is the energy stored in an object.
Work is the rate of doing energy.
How is energy related to work?
Work is the absence of energy.
Energy cannot be converted into work.
Energy is the same as mass.
Energy is the capacity to do work.
What is the formula for calculating kinetic energy?
KE = m * v
KE = 0.5 * m * v
KE = m * v^2 / 2
KE = 0.5 * m * v^2
What is potential energy? Give an example.
A fish swimming in water has potential energy because it is in a liquid environment.
An example of potential energy is a rock held at the top of a hill; it has gravitational potential energy due to its elevated position.
A stretched rubber band is an example of potential energy due to its tension.
A car moving at high speed has potential energy due to its motion.
What is the unit of force in the International System of Units?
joule (J)
newton (N)
watt (W)
pascal (Pa)
Describe the relationship between mass and acceleration in Newton's Second Law.
Acceleration is independent of mass in all scenarios.
Increasing mass always increases acceleration regardless of force.
Mass and acceleration are directly proportional when force is constant.
Mass and acceleration are inversely related when force is constant.
What is friction and how does it affect motion?
Friction is a force that enhances motion, making objects move faster.
Friction has no effect on motion and allows objects to move freely.
Friction is only present in liquids and does not occur in solids or gases.
Friction is a force that opposes motion, affecting how objects move by slowing them down or stopping them.
Explain the concept of inertia.
Inertia is the energy stored in an object at rest.
Inertia is the speed at which an object travels in a vacuum.
Inertia is the resistance of an object to change its state of motion.
Inertia is the force that causes an object to move faster.
What is the difference between speed and velocity?
Speed includes direction, while velocity does not.
Speed is scalar; velocity is vector (includes direction).
Velocity measures distance only.
Speed is a type of velocity.
How does gravity affect the motion of objects?
Gravity pulls objects towards each other, affecting their motion by causing them to accelerate downwards and influencing their trajectories.
Gravity only affects objects in space, not on Earth.
Gravity causes objects to move faster in a straight line without changing direction.
Gravity has no effect on the weight of an object.
What is the principle of conservation of energy?
Energy can be created and destroyed.
Energy is only found in physical forms.
Energy cannot be created or destroyed, only transformed.
Energy can be transferred but not transformed.
Give an example of a situation where work is done.
A tree growing in a forest.
A person sitting on a chair.
A person lifting a box off the ground.
A car parked in a garage.
