00. Work done by Force and Power
Work, Energy and Power

148804 Consider a $50 \mathrm{~m}$ high water falls, with water flowing at a rate of $1.2 \times 10^{6} \mathrm{~kg} / \mathrm{s}$. using the power generated due to this process assuming $100 \%$ efficiency the number of $60 \mathrm{~W}$ bulbs that can be light up is

1 $9.8 \times 10^{6}$
2 $5.88 \times 10^{8}$
3 $9.8 \times 10^{3}$
4 1000
Work, Energy and Power

148805 A $10 \mathrm{~m}$ long iron chain of linear mass density $0.8 \mathrm{~kg} \mathrm{~m}^{-1}$ is hanging freely from a rigid support. If $\mathrm{g}=10 \mathrm{~ms}^{-2}$, then the power required to left the chain upto the point of support in 10 second is.

1 $10 \mathrm{~W}$
2 $20 \mathrm{~W}$
3 $30 \mathrm{~W}$
4 $40 \mathrm{~W}$
Work, Energy and Power

148807 A car of mass $1200 \mathrm{~kg}$ (together with the driver) is moving with a constant acceleration of $2 \mathrm{~m} / \mathrm{s}^{2}$. How much power does the engine generate at the instance, when the speed reaches $20 \mathrm{~m} / \mathrm{s}$ ? (Assume that the coefficient of friction between the car and the road is 0.5 ).

1 $48000 \mathrm{~W}$
2 $120000 \mathrm{~W}$
3 $168000 \mathrm{~W}$
4 $288000 \mathrm{~W}$
Work, Energy and Power

148808 An object moves along the circle with normal acceleration proportional to $t^{\alpha}$, where $t$ is the time and $\alpha$ is a positive constant. The power developed by all the forces acting on the object will have time dependence proportional to

1 $t^{\alpha-1}$
2 $\mathrm{t}^{\alpha / 2}$
3 $\mathrm{t}^{\frac{1+\alpha}{2}}$
4 $\mathrm{t}^{2 \alpha}$
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Work, Energy and Power

148804 Consider a $50 \mathrm{~m}$ high water falls, with water flowing at a rate of $1.2 \times 10^{6} \mathrm{~kg} / \mathrm{s}$. using the power generated due to this process assuming $100 \%$ efficiency the number of $60 \mathrm{~W}$ bulbs that can be light up is

1 $9.8 \times 10^{6}$
2 $5.88 \times 10^{8}$
3 $9.8 \times 10^{3}$
4 1000
Work, Energy and Power

148805 A $10 \mathrm{~m}$ long iron chain of linear mass density $0.8 \mathrm{~kg} \mathrm{~m}^{-1}$ is hanging freely from a rigid support. If $\mathrm{g}=10 \mathrm{~ms}^{-2}$, then the power required to left the chain upto the point of support in 10 second is.

1 $10 \mathrm{~W}$
2 $20 \mathrm{~W}$
3 $30 \mathrm{~W}$
4 $40 \mathrm{~W}$
Work, Energy and Power

148807 A car of mass $1200 \mathrm{~kg}$ (together with the driver) is moving with a constant acceleration of $2 \mathrm{~m} / \mathrm{s}^{2}$. How much power does the engine generate at the instance, when the speed reaches $20 \mathrm{~m} / \mathrm{s}$ ? (Assume that the coefficient of friction between the car and the road is 0.5 ).

1 $48000 \mathrm{~W}$
2 $120000 \mathrm{~W}$
3 $168000 \mathrm{~W}$
4 $288000 \mathrm{~W}$
Work, Energy and Power

148808 An object moves along the circle with normal acceleration proportional to $t^{\alpha}$, where $t$ is the time and $\alpha$ is a positive constant. The power developed by all the forces acting on the object will have time dependence proportional to

1 $t^{\alpha-1}$
2 $\mathrm{t}^{\alpha / 2}$
3 $\mathrm{t}^{\frac{1+\alpha}{2}}$
4 $\mathrm{t}^{2 \alpha}$
Work, Energy and Power

148804 Consider a $50 \mathrm{~m}$ high water falls, with water flowing at a rate of $1.2 \times 10^{6} \mathrm{~kg} / \mathrm{s}$. using the power generated due to this process assuming $100 \%$ efficiency the number of $60 \mathrm{~W}$ bulbs that can be light up is

1 $9.8 \times 10^{6}$
2 $5.88 \times 10^{8}$
3 $9.8 \times 10^{3}$
4 1000
Work, Energy and Power

148805 A $10 \mathrm{~m}$ long iron chain of linear mass density $0.8 \mathrm{~kg} \mathrm{~m}^{-1}$ is hanging freely from a rigid support. If $\mathrm{g}=10 \mathrm{~ms}^{-2}$, then the power required to left the chain upto the point of support in 10 second is.

1 $10 \mathrm{~W}$
2 $20 \mathrm{~W}$
3 $30 \mathrm{~W}$
4 $40 \mathrm{~W}$
Work, Energy and Power

148807 A car of mass $1200 \mathrm{~kg}$ (together with the driver) is moving with a constant acceleration of $2 \mathrm{~m} / \mathrm{s}^{2}$. How much power does the engine generate at the instance, when the speed reaches $20 \mathrm{~m} / \mathrm{s}$ ? (Assume that the coefficient of friction between the car and the road is 0.5 ).

1 $48000 \mathrm{~W}$
2 $120000 \mathrm{~W}$
3 $168000 \mathrm{~W}$
4 $288000 \mathrm{~W}$
Work, Energy and Power

148808 An object moves along the circle with normal acceleration proportional to $t^{\alpha}$, where $t$ is the time and $\alpha$ is a positive constant. The power developed by all the forces acting on the object will have time dependence proportional to

1 $t^{\alpha-1}$
2 $\mathrm{t}^{\alpha / 2}$
3 $\mathrm{t}^{\frac{1+\alpha}{2}}$
4 $\mathrm{t}^{2 \alpha}$
Work, Energy and Power

148804 Consider a $50 \mathrm{~m}$ high water falls, with water flowing at a rate of $1.2 \times 10^{6} \mathrm{~kg} / \mathrm{s}$. using the power generated due to this process assuming $100 \%$ efficiency the number of $60 \mathrm{~W}$ bulbs that can be light up is

1 $9.8 \times 10^{6}$
2 $5.88 \times 10^{8}$
3 $9.8 \times 10^{3}$
4 1000
Work, Energy and Power

148805 A $10 \mathrm{~m}$ long iron chain of linear mass density $0.8 \mathrm{~kg} \mathrm{~m}^{-1}$ is hanging freely from a rigid support. If $\mathrm{g}=10 \mathrm{~ms}^{-2}$, then the power required to left the chain upto the point of support in 10 second is.

1 $10 \mathrm{~W}$
2 $20 \mathrm{~W}$
3 $30 \mathrm{~W}$
4 $40 \mathrm{~W}$
Work, Energy and Power

148807 A car of mass $1200 \mathrm{~kg}$ (together with the driver) is moving with a constant acceleration of $2 \mathrm{~m} / \mathrm{s}^{2}$. How much power does the engine generate at the instance, when the speed reaches $20 \mathrm{~m} / \mathrm{s}$ ? (Assume that the coefficient of friction between the car and the road is 0.5 ).

1 $48000 \mathrm{~W}$
2 $120000 \mathrm{~W}$
3 $168000 \mathrm{~W}$
4 $288000 \mathrm{~W}$
Work, Energy and Power

148808 An object moves along the circle with normal acceleration proportional to $t^{\alpha}$, where $t$ is the time and $\alpha$ is a positive constant. The power developed by all the forces acting on the object will have time dependence proportional to

1 $t^{\alpha-1}$
2 $\mathrm{t}^{\alpha / 2}$
3 $\mathrm{t}^{\frac{1+\alpha}{2}}$
4 $\mathrm{t}^{2 \alpha}$