Answer:
1875 kg car- U1;M1
1025 kg car- U2;M2
Explanation:
according to Law of conservation of linear momentum
M1×U1 + M2×U2 = M1×V + M2×V
1875×23 +1025×17 = V(1875+1025)
43125 + 17425. =V×2900
V =60550/2900
V =20.88 ms-1
the two cars move with a speed of 20.88ms-1 immediately after coalition
the answer is letter B “the materials with the greatest specific heat”
- happy to help xx
Answer:
See answer
Explanation:
The area of the circular loop is given by:
The magnetic flux is given by:
is parallel to and is constant in magnitude and direction therefore:
Part A)
initially the flux is
after the interval
the flux is
now, the EMF is defined as:
,
if we consider very small then we can re-write it as:
then:
Part B)
When looked down from above, the current flows counter clockwise, according to the right hand rule, if you place your thumb upwards (the direction of the magnetic field) and close your fingers, then the current will flow in the direction of your fingers.
V^2=u^2 +2aS
U is found first by considering that first 8 secs and using v=u+at. {different v and u though}
V=-u+gt.
Magnitude of u = magnitude of v if there is no resistance ( because the conservation of energy says the k. E. must be the same when it passes you as when it left your hand).... up is negative here, down is positive.
V+v=gt
2v= g x 8
V=4xg.= the initial velocity for the next calculation
V^2=(4g)^2+(2xgx21)
So v can be calculated.