An ice skater with a mass of 50 kg is gliding acrossthe ice at a speed of 8 m/s when herfriend comes up from behind and gives her a push, causing her speed to increase to 12m/s. How much work did the friend do on the skater

Explanation:

From the question we are told that:

Mass

Initial Velocity

Final Velocity

Generally the equation for Work-done is mathematically given by

W=\triangle K.E

Therefore

scientific laws are the result of testing theories and proving them to be facts.

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.