Question

12. The velocity-time graph of a body is parallel to time axis. What is the acceleration of the body?
13. For a moving object, derive graphically the relation between final velocity ‘v’, initial velocity ‘u’, acceleration ‘a’ and time ‘t’.
14. Draw a velocity-time graph for a body which starts to move with initial velocity ‘u’ under a constant acceleration ‘a’ for time ‘t’. Using this graph derive an expression for distance covered ‘s’ (position-time equation).
15. Derive graphically the position –velocity relationship.

Answer 1

Answer:

12.When velocity time graph is parallel to time axis, velocity = constant, i.e., acceleration of body is zero.

13.Draw a line parallel to x-axis DA from point, D from where object starts moving. Draw another line BA from point B parallel to y-axis which meets at E at y-axis. Above equation is the relation among initial vlocity (u ), final velocity (v ), acceleration (a) and time (t). It is called first equation of motion.