Laws of Motion
Physics ⇒ Mechanics
Laws of Motion starts at 8 and continues till grade 12.
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See sample questions for grade 11
Define inertia.
Describe the effect of increasing the angle of inclination on the component of gravitational force parallel to an inclined plane.
Describe the role of friction in walking.
Explain the difference between static and kinetic friction.
A 1 kg ball is dropped from rest. What is the force acting on it due to gravity? (Take g = 9.8 m/s²)
A 10 kg box is pulled with a force of 50 N on a horizontal surface. If the frictional force is 20 N, what is the acceleration of the box?
A 2 kg object is moving in a circle of radius 4 m at a constant speed of 3 m/s. What is the magnitude of the centripetal force acting on it?
A 50 kg person stands on a weighing scale in an elevator accelerating upward at 2 m/s². What is the reading on the scale? (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 is an example of Newton's Third Law of Motion?
(1) A book resting on a table
(2) A rocket launching into space
(3) A car moving at constant speed
(4) Water boiling in a kettle
Which of the following is NOT a contact force?
(1) Friction
(2) Tension
(3) Gravitational force
(4) Normal force
Which of the following is the correct expression for Newton's Second Law?
(1) F = ma
(2) F = mv
(3) F = m/g
(4) F = m/v
Fill in the blank: According to Newton's Second Law, force equals mass times _______.
Fill in the blank: The force required to accelerate a 10 kg mass at 2 m/s² is _______ N.
Fill in the blank: The frictional force that acts when an object is just about to move is called _______ friction.
Fill in the blank: The SI unit of force is _______.
True or False: Friction always acts in the direction of motion.
True or False: The action and reaction forces always act simultaneously.
True or False: The net force acting on an object is zero if it moves with constant velocity.
True or False: The net force on an object in equilibrium is zero.
