Question

A particle

moving in a
straight line with uniform
deceleration has a velocity of 10ms^-1 at a point P,
20ms^-1" at a point Q and comes to rest at a point R, where QR is 50m. Calculate the distance PQ , time taken to cover PQ and PR
R where QR = som - Calculate the
i) distance PQ
ri) time taken to cover på
11 time taken to cover P

Answer 1

A particle moving in a straight line with uniform deceleration has a velocity of 40m/s at a point, P, 20m/s at a point, Q and comes to rest at a point, R. Where QR=50m. Calculate the

Distance, PQ

Time taken to cover PQ

Time taken to cover PR

well if it is uniform (constant) deceleration, then PQ=QR=50m

average velocty PQ=30m/s, timePQ=50/30 sec

average velocity QR=10m/s, time QR=50/10 sec

total timePR=timePq+timeQR