A particle travels along a straight line at a constant speed of 10m/s for 10 seconds and then it travels in the opposite direction with constant speed of 20m/s for 20 seconds.The magnitude of average velocity during 30 seconds is

Lift travels in straight line at a constant speed of 3 cc 10^(8) m//s. What is the acceleration of lift ?

[" A particle travels along a "],[" straight line.It travels at a "],[" constant speed of "5m/s" for "10],[" seconds and then at a different "],[" constant speed of "10m/s" along "],[" the same direction for the next "],[20" seconds.The average speed "],[" during the entire "30" seconds of "],[" travel is "]

[" A particle travels along a "],[" straight line.It travels at a "],[" constant speed of "5m/s" for "10],[" seconds and then at a different "],[" constant speed of "10m/s" along "],[" the same direction for the next "],[20" seconds.The average speed "],[" during the entire "30" seconds of "],[" travel is "]

A particle travels half of the time with constant speed 2 m//s, In remaining half of the time it travels, 1/4 th distance with constant speed of 4 m//s and 3/4 th distance with 6 m//s. Find average speed during the complete journey.

A particle is moving on a straight line with constant retardation of 1 m//s^(2) . Its initial velocity is 10 m//s .

A body travels along a straight line for the first half of the total time with a constant speed of 20 m s^(-1) and for the second half of the total time with a constant speed of 30 m s^(-1) . Find the average speed of the body.

A particle moves in a straight line with constant acceleration If it covers 10 m in first second and 20 m in next second find its initial velocity.