02. Conservation of Energy and Work Energy Theorem
Work, Energy and Power

149103 A $750 \mathrm{~kg}$ boat is $10 \mathrm{~m}$ long and is floating without motion on still water. A man of mass $80 \mathrm{~kg}$ is at one end and if he runs to another end of the boat and stops, the displacement of boat is

1 $1.8 \mathrm{~m}$ in the direction of displacement of man
2 $0.96 \mathrm{~m}$ in the direction of opposite to the displacement of man
3 $0.96 \mathrm{~m}$ in the direction of displacement of the man
4 $1.8 \mathrm{~m}$ in the direction opposite to displacement of man
Work, Energy and Power

149104 A car driver is trying to jump across a path as shown in figure by driving horizontally off a cliff ' $X$ ' at the speed $10 \mathrm{~m} / \mathrm{s}$. When he touches peak $\mathrm{Z}$ (ignore air resistance), what would be speed?\(\left(\right.\) use \(\left.g=10 \mathrm{~m} / \mathrm{s}^2\right)\)

1 $30 \mathrm{~m} / \mathrm{s}$
2 $40 \mathrm{~m} / \mathrm{s}$
3 $15 \mathrm{~m} / \mathrm{s}$
4 $50 \mathrm{~m} / \mathrm{s}$
Work, Energy and Power

149105 The Work-Energy theorem

1 Does not hold in all inertial frames
2 Is independent of Newton's second law
3 May be viewed as a scalar form of Newton's second law
4 Cannot be extended to non-inertial frames
5 In independent of Newton's third law
Work, Energy and Power

149106 Which of the following statements is false?

1 Momentum is conserved in all types of collisions
2 Energy is conserved in all types of collisions
3 During elastic collisions conservative forces are involved
4 Work-energy theorem is not applicable to inelastic collisions
Work, Energy and Power

149103 A $750 \mathrm{~kg}$ boat is $10 \mathrm{~m}$ long and is floating without motion on still water. A man of mass $80 \mathrm{~kg}$ is at one end and if he runs to another end of the boat and stops, the displacement of boat is

1 $1.8 \mathrm{~m}$ in the direction of displacement of man
2 $0.96 \mathrm{~m}$ in the direction of opposite to the displacement of man
3 $0.96 \mathrm{~m}$ in the direction of displacement of the man
4 $1.8 \mathrm{~m}$ in the direction opposite to displacement of man
Work, Energy and Power

149104 A car driver is trying to jump across a path as shown in figure by driving horizontally off a cliff ' $X$ ' at the speed $10 \mathrm{~m} / \mathrm{s}$. When he touches peak $\mathrm{Z}$ (ignore air resistance), what would be speed?\(\left(\right.\) use \(\left.g=10 \mathrm{~m} / \mathrm{s}^2\right)\)

1 $30 \mathrm{~m} / \mathrm{s}$
2 $40 \mathrm{~m} / \mathrm{s}$
3 $15 \mathrm{~m} / \mathrm{s}$
4 $50 \mathrm{~m} / \mathrm{s}$
Work, Energy and Power

149105 The Work-Energy theorem

1 Does not hold in all inertial frames
2 Is independent of Newton's second law
3 May be viewed as a scalar form of Newton's second law
4 Cannot be extended to non-inertial frames
5 In independent of Newton's third law
Work, Energy and Power

149106 Which of the following statements is false?

1 Momentum is conserved in all types of collisions
2 Energy is conserved in all types of collisions
3 During elastic collisions conservative forces are involved
4 Work-energy theorem is not applicable to inelastic collisions
Work, Energy and Power

149103 A $750 \mathrm{~kg}$ boat is $10 \mathrm{~m}$ long and is floating without motion on still water. A man of mass $80 \mathrm{~kg}$ is at one end and if he runs to another end of the boat and stops, the displacement of boat is

1 $1.8 \mathrm{~m}$ in the direction of displacement of man
2 $0.96 \mathrm{~m}$ in the direction of opposite to the displacement of man
3 $0.96 \mathrm{~m}$ in the direction of displacement of the man
4 $1.8 \mathrm{~m}$ in the direction opposite to displacement of man
Work, Energy and Power

149104 A car driver is trying to jump across a path as shown in figure by driving horizontally off a cliff ' $X$ ' at the speed $10 \mathrm{~m} / \mathrm{s}$. When he touches peak $\mathrm{Z}$ (ignore air resistance), what would be speed?\(\left(\right.\) use \(\left.g=10 \mathrm{~m} / \mathrm{s}^2\right)\)

1 $30 \mathrm{~m} / \mathrm{s}$
2 $40 \mathrm{~m} / \mathrm{s}$
3 $15 \mathrm{~m} / \mathrm{s}$
4 $50 \mathrm{~m} / \mathrm{s}$
Work, Energy and Power

149105 The Work-Energy theorem

1 Does not hold in all inertial frames
2 Is independent of Newton's second law
3 May be viewed as a scalar form of Newton's second law
4 Cannot be extended to non-inertial frames
5 In independent of Newton's third law
Work, Energy and Power

149106 Which of the following statements is false?

1 Momentum is conserved in all types of collisions
2 Energy is conserved in all types of collisions
3 During elastic collisions conservative forces are involved
4 Work-energy theorem is not applicable to inelastic collisions
Work, Energy and Power

149103 A $750 \mathrm{~kg}$ boat is $10 \mathrm{~m}$ long and is floating without motion on still water. A man of mass $80 \mathrm{~kg}$ is at one end and if he runs to another end of the boat and stops, the displacement of boat is

1 $1.8 \mathrm{~m}$ in the direction of displacement of man
2 $0.96 \mathrm{~m}$ in the direction of opposite to the displacement of man
3 $0.96 \mathrm{~m}$ in the direction of displacement of the man
4 $1.8 \mathrm{~m}$ in the direction opposite to displacement of man
Work, Energy and Power

149104 A car driver is trying to jump across a path as shown in figure by driving horizontally off a cliff ' $X$ ' at the speed $10 \mathrm{~m} / \mathrm{s}$. When he touches peak $\mathrm{Z}$ (ignore air resistance), what would be speed?\(\left(\right.\) use \(\left.g=10 \mathrm{~m} / \mathrm{s}^2\right)\)

1 $30 \mathrm{~m} / \mathrm{s}$
2 $40 \mathrm{~m} / \mathrm{s}$
3 $15 \mathrm{~m} / \mathrm{s}$
4 $50 \mathrm{~m} / \mathrm{s}$
Work, Energy and Power

149105 The Work-Energy theorem

1 Does not hold in all inertial frames
2 Is independent of Newton's second law
3 May be viewed as a scalar form of Newton's second law
4 Cannot be extended to non-inertial frames
5 In independent of Newton's third law
Work, Energy and Power

149106 Which of the following statements is false?

1 Momentum is conserved in all types of collisions
2 Energy is conserved in all types of collisions
3 During elastic collisions conservative forces are involved
4 Work-energy theorem is not applicable to inelastic collisions