What is the definition of a force?
A force is a vector quantity that causes an object to change its velocity.
True or False: Forces can only be contact forces.
False
Fill in the blank: The unit of force in the SI system is the _____
Newton
What is the formula to calculate force?
Force = mass x acceleration (F = ma)
Which of the following is a type of friction? A) Static B) Kinetic C) Both A and B
C) Both A and B
What is the effect of balanced forces on an object?
Balanced forces do not change the object’s motion.
True or False: Gravity is a non-contact force.
True
What is the gravitational force acting on a 10 kg mass?
Approximately 98 Newtons (using g = 9.8 m/s²)
Fill in the blank: The _____ law states that for every action, there is an equal and opposite reaction.
Third
What type of force opposes the motion of an object sliding over a surface?
Frictional force
Which law of motion explains the relationship between force, mass, and acceleration?
Newton’s Second Law of Motion
What is the net force when two equal forces of 5 N act in opposite directions?
0 N
True or False: An object at rest will remain at rest unless acted upon by a net external force.
True
What is inertia?
Inertia is the tendency of an object to resist changes in its state of motion.
Fill in the blank: A force that causes an object to rotate is called a _____ force.
Torque
