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  1. B

    5.0 kg ball on a stirng is lifted to a height of 2.5m. It it swung down, what...

    mgh=1/2(mv^2) so if it was lifted 2.5 m then thats your height. so (5.0 kg)(9/8m/s^2)(2.5m) = 122.5 J so at the top of the swing your kinetic energy is O and Your gravitional energy is 122.5 J but when its at the bottom all converts turn kinetic energy so kinetic energy equals 122.5 J and...
  2. B

    5.0 kg ball on a stirng is lifted to a height of 2.5m. It it swung down, what...

    mgh=1/2(mv^2) so if it was lifted 2.5 m then thats your height. so (5.0 kg)(9/8m/s^2)(2.5m) = 122.5 J so at the top of the swing your kinetic energy is O and Your gravitional energy is 122.5 J but when its at the bottom all converts turn kinetic energy so kinetic energy equals 122.5 J and...
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