Chapter 7
Work, Energy, and Simple Machines
CBSE Class 9
Science Solutions
Educart Science class Class 9 NCERT Exemplar cover
Question:

Why is it easier to open the lid of a can by using a spoon as shown in Figure.[Pg. No. 135]

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Answer: Verified

It is easier to open the lid of a can using a spoon because the spoon acts as a lever. The long handle of the spoon increases the turning effect (moment of force), so a small force applied at the end of the spoon can open the lid easily.

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More NCERT Questions
Explain why roads on hills are built to wind around in gentle slopes rather than going straight up? [Pg. No. 132] To reach a higher floor, we find climbing an inclined ladder easier in comparison to climbing a vertical ladder. Explain why.[Pg. No. 132] State whether True or False. (A) Work is said to be done when a force is applied, even if the object does not move. (B) Lifting a bucket vertically upward results in positive work done on the bucket. Why do you push an object closer to scissors fulcrum when you want to cut an object which is hard? [Pg. No. 135]