Dynamics
Physics ⇒ Mechanics
Dynamics starts at 10 and continues till grade 12.
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See sample questions for grade 11
Define net force.
Describe the difference between static and kinetic friction.
Friction can be both beneficial and harmful. Give one example of each.
State Newton's First Law of Motion.
State Newton's Third Law of Motion.
A 10 kg box is pulled across a horizontal surface with a force of 50 N. If the frictional force is 20 N, what is the acceleration of the box?
A 2 kg object is acted upon by two forces: 10 N to the right and 4 N to the left. What is the acceleration of the object?
A 4 kg object is moving with a velocity of 5 m/s. What is its kinetic energy?
A ball of mass 0.2 kg is dropped from a height. What is the force of gravity acting on it? (Take g = 9.8 m/s²)
Which law explains why passengers lurch forward when a car suddenly stops?
(1) Newton's First Law
(2) Newton's Second Law
(3) Newton's Third Law
(4) Law of Universal Gravitation
Which of the following best describes dynamic equilibrium?
(1) The object is at rest
(2) The object moves with constant velocity
(3) The object is accelerating
(4) The net force is not zero
Which of the following is a vector quantity?
(1) Mass
(2) Speed
(3) Force
(4) Distance
Which of the following is NOT a fundamental force in nature?
(1) Gravitational force
(2) Frictional force
(3) Electromagnetic force
(4) Strong nuclear force
A block is at rest on a horizontal table. The normal force acting on the block is equal in magnitude and opposite in direction to its ________.
Friction always acts in the direction ________ to the motion of an object.
If the net force acting on a moving object is zero, the object will continue to move with ________.
If the net force on an object is zero, its velocity will ________.
Action and reaction forces always act on the same object. True or False?
If a net force acts on an object, the object will always accelerate. True or False?
Is it possible for an object to be in motion if the net force acting on it is zero?
