Register
A rock hits the ground with a speed of 7 m/s and a kinetic energy of 100 J. What is the rock's mass?
208k views
2 votes
A rock hits the ground with a speed of 7 m/s and a kinetic energy of 100 J. What is the rock's mass?

User Mateva
by
7.5k points

2 Answers

4 votes
mass = (2*KE) / v²
∴ the answer is 200/49
User Koque
by
7.3k points
4 votes
KE=1/2 times mass times velocity squared. So in this situation your equation would look like this 100J=1/2 times mass times 7 m/s^2. Your answer would be 4.0812 kg
User FabioG
by
8.2k points
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

8.7m questions

11.3m answers

Other Questions

At sea level, water boils at 100 degrees celcius and methane  boiled at -161 degrees celcius. Which of these substances has a stronger force of attraction between its particles? Explain your answer
Physical properties of minerals graphic organizer
A snowball is launched horizontally from the top of a building at v = 16.9 m/s. If it lands d = 44 meters from the bottom, how high (in m) was the building?
What type of rock is the Haystack rock (igneous, Metamorphic, or Sedimentary)
what is a device that transforms thermal energy to mechanical energy
Link Copied!