Match column I and column II and select the correct option. Column I Column II (a) Flight of rockets (i) Inertia of direction (b) Function of mud guards over the wheels of a motor bike (ii) Inertia of rest (c) Firing a bullet from gun (iii) Newton's third law of motion (d) Dust particles fall when a durree is beaten with a stick (iv) Law of conservation of linear momentum

( a ) - ( i i i , i v ) ; ( b ) - ( i ) ; ( c ) - ( i i i , i v ) ; ( d ) - ( i i )

( a ) - ( i i i ) ; ( b ) - ( i , i i ) ; ( c ) - ( i i ) ; ( d ) - ( i v )

( a ) - ( i i ) ; ( b ) - ( i i i ) ; ( c ) - ( i , i i ) ; ( d ) - ( i v )

( a ) - ( i ) ; ( b ) - ( i i ) ; ( c ) - ( i v ) ; ( d ) - ( i i i , i v )

MEDIUM

9th Foundation

IMPORTANT

Earn 100

A hammer weighing $2.5 kg$ moving with a speed of $1 {ms}^{- 1}$ strikes the head of the nail driving it $10 cm$ into the wall. The acceleration during impact and the impulse imparted to wall will be respectively.

50% studentsanswered this correctly

Important Questions on Force and Laws of Motion

EASY

9th Foundation

IMPORTANT

NSO Science Olympiad Workbook Grade 9>Chapter 9 - Force and Laws of Motion>EXERCISES>Q 7

Consider two spring balances hooked as shown in the figure. We pull them in opposite directions. If the reading shown by $A$ is $1.5 N$ , the reading shown by $B$ will be

Question Image

EASY

9th Foundation

IMPORTANT

NSO Science Olympiad Workbook Grade 9>Chapter 9 - Force and Laws of Motion>EXERCISES>Q 8

An object of mass $1.5 kg$ travelling in a straight line with a velocity of $5 {ms}^{- 1}$ collides with a wooden block of mass $5 kg$ resting on the floor. This object sticks with wooden block after collision and both move together in a straight line.

The total momentum after collision is

EASY

9th Foundation

IMPORTANT

NSO Science Olympiad Workbook Grade 9>Chapter 9 - Force and Laws of Motion>EXERCISES>Q 9

The velocity of the combination of these objects after collision is

MEDIUM

9th Foundation

IMPORTANT

NSO Science Olympiad Workbook Grade 9>Chapter 9 - Force and Laws of Motion>EXERCISES>Q 10

Which of the following options is correct?

(i) Force of gravitation on a body is equal to the true weight of the body.
(ii) A person standing in an elevator moving downwards with constant acceleration finds his weight less than actual.

MEDIUM

9th Foundation

IMPORTANT

NSO Science Olympiad Workbook Grade 9>Chapter 9 - Force and Laws of Motion>EXERCISES>Q 11

A ball is rolling down a slope at a steady speed. Which of the following statements is correct?

EASY

9th Foundation

IMPORTANT

NSO Science Olympiad Workbook Grade 9>Chapter 9 - Force and Laws of Motion>EXERCISES>Q 12

Which of the following graphs shows the graph between velocity

(V)

and mass

(m)

when linear momentum

(p)

is constant?

EASY

9th Foundation

IMPORTANT

NSO Science Olympiad Workbook Grade 9>Chapter 9 - Force and Laws of Motion>EXERCISES>Q 13

In the first second of it flight, a rocket ejects

\frac{1}{40}

of its mass with a velocity of

1200 {ms}^{- 1}

. The acceleration of the rocket is

HARD

9th Foundation

IMPORTANT

NSO Science Olympiad Workbook Grade 9>Chapter 9 - Force and Laws of Motion>EXERCISES>Q 14

Match column I and column II and select the correct option.

Column I		Column II
(a)	Flight of rockets	(i)	Inertia of direction
(b)	Function of mud guards over the wheels of a motor bike	(ii)	Inertia of rest
(c)	Firing a bullet from gun	(iii)	Newton's third law of motion
(d)	Dust particles fall when a durree is beaten with a stick	(iv)	Law of conservation of linear momentum

A hammer weighing 2.5 kg moving with a speed of 1 ms-1 strikes the head of the nail driving it 10 cm into the wall. The acceleration during impact and the impulse imparted to wall will be respectively.

Important Questions on Force and Laws of Motion

Learn and Prepare for any exam you want !

A hammer weighing $2.5 kg$ moving with a speed of $1 {ms}^{- 1}$ strikes the head of the nail driving it $10 cm$ into the wall. The acceleration during impact and the impulse imparted to wall will be respectively.