Dynamics
Physics ⇒ Mechanics
Dynamics starts at 10 and continues till grade 12.
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See sample questions for grade 10
Define inertia.
Describe the effect of unbalanced forces on an object.
Explain the difference between mass and weight.
Explain why a ball thrown upwards slows down and eventually falls back to the ground.
A 1.5 kg object is moving at 8 m/s. Calculate its momentum.
A 10 kg object is moving with a velocity of 4 m/s. What is its momentum?
A 2 kg object is dropped from a height. What is the force of gravity acting on it? (Take g = 9.8 m/s²)
A 3 kg object is moving at 6 m/s. What is its kinetic energy?
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 Gravitation
Which of the following best describes Newton's Third Law?
(1) For every action, there is an equal and opposite reaction.
(2) Force equals mass times acceleration.
(3) Objects at rest stay at rest.
(4) Energy is conserved.
Which of the following is a non-contact force?
(1) Friction
(2) Tension
(3) Gravitational force
(4) Normal force
Which of the following is an example of Newton's Third Law?
(1) A book resting on a table
(2) A rocket launching
(3) A car at rest
(4) A ball rolling down a hill
Friction always acts in the ________ direction to the motion of an object.
If the net force on an object is zero, its acceleration is ________.
The acceleration due to gravity on Earth is approximately ________ m/s².
The force that keeps planets in orbit around the Sun is called ________.
Friction can be reduced by using lubricants. True or False?
Friction is necessary for walking. True or False?
If an object is moving in a circle at constant speed, is it accelerating?
Is it possible for an object to be in motion if the net force acting on it is zero?
