Laws of motion and Optics

Inertia of a body depends on

• Weight of the object

• Mass of the object

• Acceleration due to gravity of the planet

Impulse is equal to

• Rate of change of momentum

• Rate of force and time

• Change of momentum

One kilogram force equals to

• 9.8 dyne

• 9.8 $\times10^4$  N

• 98 $\times10^4$  dyne

Passengers lean forward when sudden brake is applied in a moving vehile This can be explained by

A man of mass 100kg has a weight of ______at the surface of the earth

• 980 N

• 970 N

• 960 N

• 950 N

"For every action, there is an equal and opposite reaction."

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law
• Newton's 4th Law

Where should an object should be placed so that a real and inverted image of same size is obtained by a convex lens.

The refractive index of a transparent medium is always greater than

Amount of light entering into the eye is controlled by

A small bulb is placed at the princpal focus of a convex lens. When the bulb is switched on, the lens will produce.

• a convergent beam of light

• a divergent beam of light

• a parallel beam of light