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The position-time (x-t) graphs for two children A and B returning from their school O to their homes P and Q respectively are shown in Figure Choose the correct entries in the brackets below;
(a) (A/B) lives closer to the school than (B/A)
(b) (A/B) starts from the school earlier than (B/A)
(c) (A/B) walks faster than (B/A)
(d) A and B reach home at the (same/different) time
(e) (A/B) overtakes (B/A) on the road (once/twice).
A drunkard walking in a narrow lane takes 5 steps forward and 3 steps backward, followed again by 5 steps forward and 3 steps backward, and so on. Each step is 1 m long and requires 1 s. Plot the x-tgraph of his motion. Determine graphically and otherwise how long the drunkard takes to fall in a pit 13 m away from the start.
Figure shows the x-t plot of one-dimensional motion of a particle. Is it correct to say from the graph that the particle moves in a straight line for t < 0 and on a parabolic path for t > 0? If not, suggest a suitable physical context for this graph.
State the number of significant figures in the following:
2.64 × 1024 kg
Read each statement below carefully and state with reasons and examples, if it is true or false;
A particle in one-dimensional motion with positive value of acceleration mustbe speeding up.
Look at the graphs (a) to (d) Figure carefully and state, with reasons, which of these cannot possibly represent one-dimensional motion of a particle.
- Physics Textbook Part - 1 for Class - 11 - 11086