The object would impact with an Energy of .174 J. That is because the energy formula is 1/2 x m x v^2 and the mass was .04kg and the velocity was 2.95m/s so then multiplied 2.95 by itself to get 8.7 and then found 1/2 of .04 which is .02. That means to multiply .02 x 8.7= .174 J which is the energy of the golf ball’s strike against the shoe. 1/2 x Mass x Velocity^2 1/2 x 0.045 kg x .98 m/s 0.0225 x .98 m/s2 The object impacted with 0.02 Joules of energy. (Rounding) The object would impact with 0.02 Joules. This problem is done first by writing out the energy formula. The energy formula is 1/2 x Mass x Velocity^2. Then, plug the numbers into the formula. The mass of the object is 0.045 kg. So, plug in that number where the mass should go. Then the velocity is 0.98 because all things accelerate at 9.8 m/s. So if the object does this in 0.1 seconds, the velocity would be 0.98, then this should be squared! Thus, .96 m/s^2. This is because in the formula it says to square the velocity. After that, split the mass in half because this is an average, and multiply that times .96. So, .02 J is the energy for the object that is falling. (The answer is rounded to the nearest whole number, 2.)

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# Energy Question Exemplars