Newton’s 2^nd law of motion helps in the measurement of:

• Pressure

• Force

• Weight

• Mass

The law of conservation of momentum states that momentum of an isolated system is always remains:

• Constant

• Lesser

• Greater

• Zero

The force with which earth attracts anybody is:

• Weight

• Gravitational force

• Both weight and gravitational force

• Centripetal force

It’s the characteristic of a body due to which it resist any change in its state:

• Momentum

• Weight

• Force

• Inertia

The motion of insects is called:

• random motion

• circular motion

• rotatory motion

• vibratory motion

scalar quantities are only specified by:

• direction

• arrow head

• magnitudes

• none of them

If F=5.3 km, F_y=43.8km then F is:

• 40km

• 44.11km

• 440km

• 480km

The value of sin45 is:

• $\sqrt{2}$

• $\sqrt{\frac{3}{2}}$

• $\frac{1}{\sqrt{2}}$

• 1

In scientific work most important thing is:

• Observation

• Experiment

• Hypothesis

• Theory

A systematic error is due to?

• Experiment

• Weather

• Instrument

• System