Class 11 Physics | Fun Learning Quest for Kids

You're designing a smartphone app that simulates a cricket ball's trajectory. If you accidentally set the gravitational constant as 9.81 m/s² instead of 9.81 m/s² (same value), but your unit for distance is in centimetres instead of metres, what happens to your projectile's range calculation?

You measure the time period of a pendulum 10 times and get values: 2.01 s, 2.03 s, 1.99 s, 2.02 s, 2.00 s, 2.04 s, 1.98 s, 2.01 s, 2.02 s, 2.00 s. The least count of your stopwatch is 0.01 s. What is the correct way to report the time period with proper significant figures?

You are in a metro train at rest. The train next to you starts moving forward. For a split second, you feel as if your own train is moving backward. This illusion arises because: