Question

a body travels 2m in first two seconds, and 2.2m in next four seconds,what will be the distance traveled in seventh second of its motion?

Answer 1

Answer:

10cm per second.

Explanation:

s=ut+

2

1

at

2

For case 1.

200=2u+2a

u+a=100....(1)

For case 2. .i.e. next 4 seconds, we have distance =420 cm and time =6 s

420=6u+18a

u+3a=70....(2)

Solving equation 1 and 2, we get,

u=115 cm/s and a=−15 cm/s

2

Now by

v=u+at

v=115−15×7

v=10 cm/s

you can convert it into metre per second