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 8
A person kicks a football and it moves. Which law of motion is demonstrated here?
Describe what happens to the motion of an object if the forces acting on it are unbalanced.
Describe what happens when you push a wall and the wall does not move.
Explain the difference between mass and weight.
A 15 kg cart is pulled with a force of 60 N. If the frictional force opposing the motion is 15 N, what is the acceleration of the cart?
A 2 kg object is moving at 5 m/s. If a force of 8 N acts in the direction of motion for 2 seconds, what will be the final velocity of the object?
A ball is rolling on a smooth surface and comes to a stop after some time. Which force is responsible for stopping the ball?
A force of 30 N is applied to a 10 kg object at rest on a frictionless surface. How far will the object travel in 4 seconds?
Which of the following best describes inertia?
(1) Tendency to change motion
(2) Tendency to resist change in motion
(3) Tendency to accelerate
(4) Tendency to stop moving
Which of the following is an example of Newton's First Law?
(1) A ball at rest remains at rest
(2) A rocket launching
(3) A car accelerating
(4) A falling apple
Which of the following is an example of Newton's Third Law?
(1) A ball rolling on the ground
(2) A rocket launching
(3) A book lying on a table
(4) Water boiling
Which of the following is an example of unbalanced forces?
(1) A book resting on a table
(2) A car accelerating
(3) A hanging picture
(4) A stationary chair
Fill in the blank: According to Newton's Third Law, every action has an __________ and __________ reaction.
Fill in the blank: The acceleration produced in a body is __________ proportional to the force applied.
Fill in the blank: The force of gravity on an object is also called its __________.
Fill in the blank: The force that opposes the motion of objects is called __________.
True or False: Action and reaction forces act on the same object.
True or False: An object at rest will remain at rest unless acted upon by an external force.
True or False: Friction always acts in the direction of motion.
True or False: Newton's Third Law applies only to moving objects.
