Newton's Law of Motion and It's Application
LAWS OF MOTION (ADDITIONAL)

371710 A lift of mass \(1000 \mathrm{~kg}\) is moving upwards with an acceleration of \(1 \mathrm{~m} / \mathrm{s}^{2}\). The tension developed in the string, which is connected to lift is
\(\left(\mathrm{g}=9.8 \mathrm{~m} / \mathrm{s}^{2}\right)\)

1 \(9800 \mathrm{~N}\)
2 \(10800 \mathrm{~N}\)
3 \(11000 \mathrm{~N}\)
4 \(10000 \mathrm{~N}\)
LAWS OF MOTION (ADDITIONAL)

371711 A stationary body of mass \(3 \mathrm{~kg}\) explodes into three equal pieces. Two of the pieces fly off in two mutually perpendicular directions, one with a velocity of \(3 \hat{\mathrm{i}} \mathrm{ms}^{-1}\) and the other with a velocity of \(4 \hat{\mathbf{j} \mathrm{ms}^{-1}}\). If the explosion occurs in \(10^{-4} \mathrm{~s}\), the average force acting on the third piece in Newton is

1 \((3 \hat{\mathrm{i}}+4 \hat{\mathrm{j}}) \times 10^{-4}\)
2 \((3 \hat{i}-4 \hat{j}) \times 10^{-4}\)
3 \((3 \hat{\mathrm{i}}+4 \hat{\mathrm{j}}) \times 10^{4}\)
4 \(-(3 \hat{i}+4 \hat{j}) \times 10^{4}\)
5 \((4 \hat{\mathrm{i}}-3 \hat{\mathrm{j}}) \times 10^{4}\)
LAWS OF MOTION (ADDITIONAL)

371712 A golf ball of mass \(50 \mathrm{gm}\) placed on a tee, is truck by a golf-club. The speed of the golf ball as it leaves the tee is \(100 \mathrm{~m} / \mathrm{s}\), the time of contact on the ball is \(0.02 \mathrm{~s}\). If the force decreases to zero linearly with time, then the force at the beginning of the contact is

1 \(100 \mathrm{~N}\)
2 \(200 \mathrm{~N}\)
3 \(250 \mathrm{~N}\)
4 \(500 \mathrm{~N}\)
LAWS OF MOTION (ADDITIONAL)

371713 Assertion [A]: A boy feels more pain when he falls down on a hard concrete floor than when he falls on the sand floor
Reason [R]: Every action has equal and opposite reaction. The time of impact of cement floor is smaller compared to that of sand floor

1 \([A]\) and \([R]\) are true and \([R]\) is correct explanation of \([\mathrm{A}]\)
2 \([\mathrm{A}]\) and \([\mathrm{R}]\) are true and \([\mathrm{R}]\) is not correct explanation of \([\mathrm{A}]\)
3 \([A]\) is true and \([R]\) is false
4 \([\mathrm{A}]\) is false, and \([\mathrm{R}]\) is true
LAWS OF MOTION (ADDITIONAL)

371710 A lift of mass \(1000 \mathrm{~kg}\) is moving upwards with an acceleration of \(1 \mathrm{~m} / \mathrm{s}^{2}\). The tension developed in the string, which is connected to lift is
\(\left(\mathrm{g}=9.8 \mathrm{~m} / \mathrm{s}^{2}\right)\)

1 \(9800 \mathrm{~N}\)
2 \(10800 \mathrm{~N}\)
3 \(11000 \mathrm{~N}\)
4 \(10000 \mathrm{~N}\)
LAWS OF MOTION (ADDITIONAL)

371711 A stationary body of mass \(3 \mathrm{~kg}\) explodes into three equal pieces. Two of the pieces fly off in two mutually perpendicular directions, one with a velocity of \(3 \hat{\mathrm{i}} \mathrm{ms}^{-1}\) and the other with a velocity of \(4 \hat{\mathbf{j} \mathrm{ms}^{-1}}\). If the explosion occurs in \(10^{-4} \mathrm{~s}\), the average force acting on the third piece in Newton is

1 \((3 \hat{\mathrm{i}}+4 \hat{\mathrm{j}}) \times 10^{-4}\)
2 \((3 \hat{i}-4 \hat{j}) \times 10^{-4}\)
3 \((3 \hat{\mathrm{i}}+4 \hat{\mathrm{j}}) \times 10^{4}\)
4 \(-(3 \hat{i}+4 \hat{j}) \times 10^{4}\)
5 \((4 \hat{\mathrm{i}}-3 \hat{\mathrm{j}}) \times 10^{4}\)
LAWS OF MOTION (ADDITIONAL)

371712 A golf ball of mass \(50 \mathrm{gm}\) placed on a tee, is truck by a golf-club. The speed of the golf ball as it leaves the tee is \(100 \mathrm{~m} / \mathrm{s}\), the time of contact on the ball is \(0.02 \mathrm{~s}\). If the force decreases to zero linearly with time, then the force at the beginning of the contact is

1 \(100 \mathrm{~N}\)
2 \(200 \mathrm{~N}\)
3 \(250 \mathrm{~N}\)
4 \(500 \mathrm{~N}\)
LAWS OF MOTION (ADDITIONAL)

371713 Assertion [A]: A boy feels more pain when he falls down on a hard concrete floor than when he falls on the sand floor
Reason [R]: Every action has equal and opposite reaction. The time of impact of cement floor is smaller compared to that of sand floor

1 \([A]\) and \([R]\) are true and \([R]\) is correct explanation of \([\mathrm{A}]\)
2 \([\mathrm{A}]\) and \([\mathrm{R}]\) are true and \([\mathrm{R}]\) is not correct explanation of \([\mathrm{A}]\)
3 \([A]\) is true and \([R]\) is false
4 \([\mathrm{A}]\) is false, and \([\mathrm{R}]\) is true
LAWS OF MOTION (ADDITIONAL)

371710 A lift of mass \(1000 \mathrm{~kg}\) is moving upwards with an acceleration of \(1 \mathrm{~m} / \mathrm{s}^{2}\). The tension developed in the string, which is connected to lift is
\(\left(\mathrm{g}=9.8 \mathrm{~m} / \mathrm{s}^{2}\right)\)

1 \(9800 \mathrm{~N}\)
2 \(10800 \mathrm{~N}\)
3 \(11000 \mathrm{~N}\)
4 \(10000 \mathrm{~N}\)
LAWS OF MOTION (ADDITIONAL)

371711 A stationary body of mass \(3 \mathrm{~kg}\) explodes into three equal pieces. Two of the pieces fly off in two mutually perpendicular directions, one with a velocity of \(3 \hat{\mathrm{i}} \mathrm{ms}^{-1}\) and the other with a velocity of \(4 \hat{\mathbf{j} \mathrm{ms}^{-1}}\). If the explosion occurs in \(10^{-4} \mathrm{~s}\), the average force acting on the third piece in Newton is

1 \((3 \hat{\mathrm{i}}+4 \hat{\mathrm{j}}) \times 10^{-4}\)
2 \((3 \hat{i}-4 \hat{j}) \times 10^{-4}\)
3 \((3 \hat{\mathrm{i}}+4 \hat{\mathrm{j}}) \times 10^{4}\)
4 \(-(3 \hat{i}+4 \hat{j}) \times 10^{4}\)
5 \((4 \hat{\mathrm{i}}-3 \hat{\mathrm{j}}) \times 10^{4}\)
LAWS OF MOTION (ADDITIONAL)

371712 A golf ball of mass \(50 \mathrm{gm}\) placed on a tee, is truck by a golf-club. The speed of the golf ball as it leaves the tee is \(100 \mathrm{~m} / \mathrm{s}\), the time of contact on the ball is \(0.02 \mathrm{~s}\). If the force decreases to zero linearly with time, then the force at the beginning of the contact is

1 \(100 \mathrm{~N}\)
2 \(200 \mathrm{~N}\)
3 \(250 \mathrm{~N}\)
4 \(500 \mathrm{~N}\)
LAWS OF MOTION (ADDITIONAL)

371713 Assertion [A]: A boy feels more pain when he falls down on a hard concrete floor than when he falls on the sand floor
Reason [R]: Every action has equal and opposite reaction. The time of impact of cement floor is smaller compared to that of sand floor

1 \([A]\) and \([R]\) are true and \([R]\) is correct explanation of \([\mathrm{A}]\)
2 \([\mathrm{A}]\) and \([\mathrm{R}]\) are true and \([\mathrm{R}]\) is not correct explanation of \([\mathrm{A}]\)
3 \([A]\) is true and \([R]\) is false
4 \([\mathrm{A}]\) is false, and \([\mathrm{R}]\) is true
LAWS OF MOTION (ADDITIONAL)

371710 A lift of mass \(1000 \mathrm{~kg}\) is moving upwards with an acceleration of \(1 \mathrm{~m} / \mathrm{s}^{2}\). The tension developed in the string, which is connected to lift is
\(\left(\mathrm{g}=9.8 \mathrm{~m} / \mathrm{s}^{2}\right)\)

1 \(9800 \mathrm{~N}\)
2 \(10800 \mathrm{~N}\)
3 \(11000 \mathrm{~N}\)
4 \(10000 \mathrm{~N}\)
LAWS OF MOTION (ADDITIONAL)

371711 A stationary body of mass \(3 \mathrm{~kg}\) explodes into three equal pieces. Two of the pieces fly off in two mutually perpendicular directions, one with a velocity of \(3 \hat{\mathrm{i}} \mathrm{ms}^{-1}\) and the other with a velocity of \(4 \hat{\mathbf{j} \mathrm{ms}^{-1}}\). If the explosion occurs in \(10^{-4} \mathrm{~s}\), the average force acting on the third piece in Newton is

1 \((3 \hat{\mathrm{i}}+4 \hat{\mathrm{j}}) \times 10^{-4}\)
2 \((3 \hat{i}-4 \hat{j}) \times 10^{-4}\)
3 \((3 \hat{\mathrm{i}}+4 \hat{\mathrm{j}}) \times 10^{4}\)
4 \(-(3 \hat{i}+4 \hat{j}) \times 10^{4}\)
5 \((4 \hat{\mathrm{i}}-3 \hat{\mathrm{j}}) \times 10^{4}\)
LAWS OF MOTION (ADDITIONAL)

371712 A golf ball of mass \(50 \mathrm{gm}\) placed on a tee, is truck by a golf-club. The speed of the golf ball as it leaves the tee is \(100 \mathrm{~m} / \mathrm{s}\), the time of contact on the ball is \(0.02 \mathrm{~s}\). If the force decreases to zero linearly with time, then the force at the beginning of the contact is

1 \(100 \mathrm{~N}\)
2 \(200 \mathrm{~N}\)
3 \(250 \mathrm{~N}\)
4 \(500 \mathrm{~N}\)
LAWS OF MOTION (ADDITIONAL)

371713 Assertion [A]: A boy feels more pain when he falls down on a hard concrete floor than when he falls on the sand floor
Reason [R]: Every action has equal and opposite reaction. The time of impact of cement floor is smaller compared to that of sand floor

1 \([A]\) and \([R]\) are true and \([R]\) is correct explanation of \([\mathrm{A}]\)
2 \([\mathrm{A}]\) and \([\mathrm{R}]\) are true and \([\mathrm{R}]\) is not correct explanation of \([\mathrm{A}]\)
3 \([A]\) is true and \([R]\) is false
4 \([\mathrm{A}]\) is false, and \([\mathrm{R}]\) is true