Q.1: In 1581, Galileo wrote his first scientific book ________________, where he described Archimedes’ method of finding the relative densities of substances using a balance.
a) Letters on the Sunspots
b) Starry Messenger
c) The Little Balance
Q.2: The SI unit of momentum is ____________________.
a) metre per second
b) kilogram-metre per second
Q.3: A force of one Newton produces an acceleration of _________ on an object of mass 1 kg.
a) 1 m s -1
b) 1 m s
c) (-1) m s -1
Q.4: ___________ is the natural tendency of an object to resist a change in its state of motion or of rest.
Q.5: To accelerate the motion of an object, a/an _____________ force is required.
Q.6: The ___________ law of motion gives us a method to measure the force acting on an object as a product of its mass and acceleration.
Q.7: Frictional forces act opposite to the direction of motion.
Q.8: Which law of motion is also known as the “law of inertia” ?
Q.9: The _________ of an object is a measure of its inertia.
Q.10: Which of the following statements are correct regarding the “Conservation Laws” ?
i) A conservation law can not be proved.
ii) A single experiment against the law can not disprove it.
iii) It can be verified by conducting experiments.
a) i and ii
b) ii and iii
c) i and iii