Question

A ball is dropped from a height of 90m on a floor.At each collision with the floor ,the ball loses one tenth of its speed.Plot the speed time graph of its motion between t=0 to 12s

Answer 1

S= ut + 1/2 * a* t^2

Answer 2

t=4.29 s

Answer 3

yup

Answer 4

nw find final velocity

Answer 5

v = u + at

Answer 6

42.04m/s

Answer 7

9/10v=37.84m/s

Answer 8

yes..... procede

Answer 9

i could just not the plot the graph

Answer 10

The graph would look something like this:

Answer 11

The graph will be discontinuous since at the time the ball hits the ground its speed drops abruptly and not gradually.

Answer 12

http://gyazo.com/d1e17e6cb6d538e94459b5d5d03b1cb4

Answer 13

The picture shows the discontinuities joined.If you watch closer the graph in the picture shows at time t=4 seconds the particle may have any speed between 42 and 32.But that is meaningless.So it is actually discontinuous.

Answer 14

yea i agree with @kartiksriramk ...it should be this way.