1 CDDCB
6 CCADC
11BDABC
15CBCAA
20CBADB
25DAABB
Check your answers and any queries will be answered next week during tutorial
Questions with difficulty:
4. Starting from rest hence x= 0.5 at2. After next interval means that the time is 2t. The value of x' = 4at2 which is 4x. During this second time interval the distance travelled is 4x-x= 3x.
9. The work done by the force F= elastic potential energy + heat energy. Hence it is not elastic potential energy unless no heat is produced.
12 . Power = Fv , P = kv3.
Writing ration of the two cases P2 can be found.
12. Work done by the external pressure = p ext(change in V). Work done by the gas = Net work done = (change in pressure)xchange in vol.
17. L = n1(24) = n2 (30) . Hence the n1=5 and n2 = 4. Length = 120 m
24. The broken lamp has 240 V reading and the unbroken one has 0 reading. use the rule that pd = IR. If I = 0 , pd = 0 eventhough the lamp is not broken.
