RISE Science Grade 7 Practice Questions - RISE Science - Grade 7 Exam

Access More Questions

During a science investigation, a student releases a steel ball and a plastic ball of the exact same size down identical ramps. How does friction affect the rolling balls on a carpeted surface compared to a smooth wooden surface?

Carpet exerts greater friction, which converts more kinetic energy into thermal energy and slows the balls faster. Carpet exerts less friction than wood because carpet fibers compress easily. Friction depends only on gravity, so both surfaces exert identical frictional forces. Friction speeds up the balls on carpet by creating extra grip.

Correct Answer:

Carpet exerts greater friction, which converts more kinetic energy into thermal energy and slows the balls faster.

Access more questions from this quiz

Continue to RISE Science Grade 7 Practice Questions - RISE Science - Grade 7 Exam for more practice questions and the full quiz experience.

Access More Questions