Question

1. Which reason is correct for the above observation in figure (b)?

(a) The coin possesses inertia of rest, it accepts the change of its state and hence falls in glass

(b) The coin possesses inertia of motion, it resists the change and hence falls in glass

(c) The coin possesses inertia of rest, it resists the change of its state and hence fails in the glass

(d) The coin possesses inertia of motion, it accepts the change of its state and hence falls in the glass

2. Which of the following laws is involved in this case?

(a) Newton's second law of motion

(b) Newton's first law of motion

(c) Newton's third law of motion

(d) Law of conservation of energy

3. If the one rupee coin is replaced by a heavy five rupee coin, then what will be your observation?

(a) Heavy coin will possess more inertia so it will not fall in tumbler

(b) Heavy coin will possess less inertia so it will fall in tumbler

(c) Heavy coin will possess more inertia so it will fall in tumbler

(d) Heavy coin will possess less inertia so it will not fall in tumbler

4. Which of the following laws provides the definition of force?

(a) Law of conservation of mass

(b) Newton's third law of motion

(c) Newton's first law of motion

(d) Newton's second law of motion

5. CGS unit of force is

(a) Newton

(b) Dyne

(c) Pound

(d) None of the above​

Answer 1

pound is correct answer

Answer 2

1. (c) The coin possesses inertia of motion, it resists the change of its state and hence falls in the glass.  

2. (b) Newton's first law of motion.  

3. (c) Heavy coin will possess more inertia so it will fall in tumbler.  

4. (d) Newton's second law of motion.  

5. (b) Dyne  

Explanation:  

Newton's First law of motion:

• It states that "a body tends to remain at rest to tends to remain in uniform motion unless and until an external force of push or pull is applied onto it".
• This property of resisting any change in its state is called inertia.
• Inertia is a property of mass. It is directly proportional to the mass of an object.
• More the mass, higher is its inertia.  

Newton's second law of motion:

• It states that "force is defined as the rate of change in momentum with time".
• It defines force and gives an expression for force:
• $F=ma$ where $m$ is the mass of object and $a$ is the acceleration of object.

Cgs unit is the centimetre-gram-second unit. Unit of Force in cgs system is Dyne.

1. Due to inertia, the coin tend to remain at rest and resisted any change in its state and so its falls in the glass.
2. Newton's first law explains this case of inertial property of mass.
3. When the coin is replaced by a five rupee coin, the heavy mass will have higher inertia.
4. Newton's second law of motion defines force.
5. $1Newton=100000 dynes$