26. A body of mass 100 g is thrown vertically upward with a velocity 2

1.	26. A body of mass 100 g is thrown vertically upward with a velocity 20 m/s. Upto what height will thebody rise? How much will be the total energy of the body at that height ? (g = 10 m/s?)
Answer» When an object is thrown upward,it's final VELOCITY BECOMES zero at its maximum HEIGHT. So, U=20m/s , v=0 We know that, V^2=u^2+2gh V^2=u^2+2(-g)h ( because the action is against gravity) 0=20^2-2×10×h (g=10m/s^2) 400=20h h=20m Now, at the maximum height we will only CONSIDER potential energy as v=0.So,kinetic energy will be zero. m=0.1kg , h=20m, g=10m/s^2 So, E=mgh E=0.1×10×20 E=20J

26. A body of mass 100 g is thrown vertically upward with a velocity 20 m/s. Upto what height will thebody rise? How much will be the total energy of the body at that height ? (g = 10 m/s?)

Answer»

When an object is thrown upward,it's final VELOCITY BECOMES zero at its maximum HEIGHT.

So,

U=20m/s , v=0

We know that,

V^2=u^2+2gh

V^2=u^2+2(-g)h ( because the action is against gravity)

0=20^2-2×10×h (g=10m/s^2)

400=20h

h=20m

Now, at the maximum height we will only CONSIDER potential energy as v=0.So,kinetic energy will be zero.

m=0.1kg , h=20m, g=10m/s^2

So, E=mgh

E=0.1×10×20

E=20J

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26. A body of mass 100 g is thrown vertically upward with a velocity 20 m/s. Upto what height will thebody rise? How much will be the total energy of the body at that height ? (g = 10 m/s?)​

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26. A body of mass 100 g is thrown vertically upward with a velocity 20 m/s. Upto what height will thebody rise? How much will be the total energy of the body at that height ? (g = 10 m/s?)