Motion under Gravity

Why do pendulum clocks usually lose time in summer?

A girl is swinging on a swing in sitting position. When the girl stands up, the period of the swing will –

Consider the following statements: A simple pendulum is set into oscillation. Then: 1. the acceleration is zero when the bob passes through the mean position. 2. in each cycle the bob attains a given velocity twice. 3. both acceleration and velocity of the bob are zero when it reaches its extreme position during the oscillation. 4. the amplitude of oscillation of the simple pendulum decreases with time. Which of these statements are correct?

A pendulum clock can run faster in –

Earth’s escape velocity is –

What will happen if an object is thrown into space with the speed of 8 km/sec.?

There is no atmosphere on the Moon because –

Given below are two statements – Assertion (A): Lighting a candle in space does not produce a flame. Reason (R): A flame exists due to the pull of gravity. In the context of above, which one of the following is correct?

In the state of weightlessness, the size of candle’s flame will be –