Friction [NSO Level 1- Science Olympiad (SOF) Class 8]: Questions 6 - 9 of 65
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Question 6
Question MCQ▾
In a school building there are four ways with equal length to reach the main gate. First is the main path paved with polished lock tiles, second is a concrete path, third is paved with sand, and the fourth one is paved with gravel which is used for four wheelers. Rahul has a sprain on his right leg and doctor advised him not to give much strain to that leg. Which of the paths should he select?
Choices
Choice (4) | Response | |
---|---|---|
a. | First | |
b. | Third | |
c. | Fourth | |
d. | Second |
Question 8
Question MCQ▾
When a worker uses a rolling grindstone to sharpen the knife, sparks are produced. This is because
Choices
Choice (4) | Response | |
---|---|---|
a. | Light energy is produced due to friction | |
b. | Heat energy produced due to friction changes to light energy | |
c. | The edge of the knife starts burning by heat | |
d. | None of the above |
Question 9
Question MCQ▾
When Riya slipped while walking through the passage, her teacher advised her to change her worn out shoe. The reason is
Choices
Choice (4) | Response | |
---|---|---|
a. | Smooth surface experiences less friction | |
b. | She slipped because of less friction | |
c. | The soul of a worn out shoe is smooth | |
d. | All a., b. and c. are correct |