Question

. A particle is moving with uniform acceleration along a
straight line. The average velocity of the particle from P to Q
is 8ms- and that Q to S is 12ms. If QS = PQ, then the
average velocity from P to S​

Answer 1

Answer:

The velocityt at B is 12m/s

The average velocity between A and B is 10m/s

The ratio of the time to go from A to B to that from B to C is 3:2

The average velocity between B and C is 15m/s

Answer :

B::C::D

Solution :

Motion A to C ⇒172=72+2as

Motion A to B ⇒v2B=72+2a(s2)=172+722

(A)vB=289+492−−−−−−−−√=13m/s

(B) <vAB>=7+132=10m/s

(C) t1=13−7a,t2=17−13a,t1t2=64=32

(D) <vBC>=13+172=15m/s