Free help with homework

Why join Brainly?

  • ask questions about your assignment
  • get answers with explanations
  • find similar questions


When two things are struck hard against each other or if they are rubbed together vigorously, this causes a friction force to develop. This friction produces heat, which we see in the form of sparks.

Hope it helps :)

Good day!
1 5 1
Because of heat................
1 1 1
The Brain
  • The Brain
  • Helper
Not sure about the answer?
Learn more with Brainly!
Having trouble with your homework?
Get free help!
  • 80% of questions are answered in under 10 minutes
  • Answers come with explanations, so that you can learn
  • Answer quality is ensured by our experts