1 kWh of energy equals MCQ with Answer and Explanation
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Question #1
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The apparent weight of a person in an elevator moving downwards with an acceleration 'a' (where a < g) is:
Correct Answer: Option B
Explanation:
When an elevator moves downwards with acceleration 'a', the net downward force on the person is mg - R = ma, where R is the normal reaction (apparent weight). Solving for R gives R = m(g - a). Since g - a is less than g, the apparent weight (R) is less than the true weight (mg).
When an elevator moves downwards with acceleration 'a', the net downward force on the person is mg - R = ma, where R is the normal reaction (apparent weight). Solving for R gives R = m(g - a). Since g - a is less than g, the apparent weight (R) is less than the true weight (mg).
Question #2
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The instrument that measures the density of a liquid is
Question #3
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A car accelerates from rest at 4 m/s² for 5 s, then moves at constant velocity for 5 s. Total distance is
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