Science Lesson 1 What Is Force Flashcards
What is force?
Force is a push or pull that can change the state of motion of an object.
True or False: Force is a vector quantity.
True
What is the SI unit of force?
Newton (N)
Fill in the blank: According to Newton’s second law, force equals ________ times acceleration.
mass
What is the equation for force?
Force = mass x acceleration
What is the net force acting on an object in equilibrium?
Zero
True or False: Friction is a force that opposes motion.
True
What type of force keeps planets in orbit around the sun?
Gravitational force
What is the formula for gravitational force between two objects?
F = G * (m1 * m2) / r^2
Fill in the blank: The force of gravity on Earth is approximately ________ N/kg.
9.8
What is the normal force?
The force exerted by a surface to support the weight of an object resting on it.
What is the force experienced by a charged particle moving in a magnetic field?
Magnetic force
What is the unit of charge in the SI system?
Coulomb (C)
What type of force holds atoms and molecules together?
Electromagnetic force
True or False: Tension is a force that acts along a stretched string or rope.
True
What is the force that opposes the motion of an object through a fluid?
Drag force
What is the force that results from the deformation of an object?
Spring force
Fill in the blank: The force that a surface exerts on an object in contact with it is called ________ force.
normal
What is the force that arises due to the interaction of two electrically charged objects?
Electrostatic force
True or False: Weight is a force that depends on the mass of an object.
True
What is the force exerted by a spring when it is stretched or compressed?
Spring force
What type of force acts on an object in free fall?
Gravity
Fill in the blank: The force of air resistance on a falling object depends on its ________ and speed.
shape
What is the force that opposes the motion of an object sliding across a surface?
Frictional force
