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A phone is knocked off a table 800cm of the ground. If the phone is 650g a) what is the gravational potential of the phone? b)what speed will the phone hit the floor at? c)How long will it take for the phone to hit the floor?

UNITS - SI UNITS: 800cm --> 0.8m 0.65kg

a) Ep= mg(change) height

Ep=0.65kg * 9.81m/s² * 0.80m

Ep=5.10 Joules (J)

b) Gravational Potential = Kinetic energy

Answered by Julia J. • Physics tutor

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what would be the mass required to keep an object with a mass of 250kg orbiting at a constant distance of 100km with a linear velocity of 100m/s?

the linear speed of an orbiting body is given by the equation sqrt(GM/2r) where M is the mass of the attracting body, G is the gravitational constant and r is the distance between the two bodies' centres ...

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Answered by Manika S. • Physics tutor

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2271 Views

If f(x)= ln(x^2)-4, give f^-1(x)

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Answered by Zach T. • Physics tutor

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