A.) -0.40 m/s
B.) -3.60 m/s
C.) -1.80 m/s
By the law of momentum conservation:-
=>m1u1 + m2u2 = m1v1 + m2v2
=>5 x (-3.2) + 0 = 5v1 + 3.9v2
=>1.28v1 + v2 = -4.10 ---------------(i)
for elastic collision:-
=>v1 - v2 = u2 - u1
=>v1 - v2 = 0 - (-3.2)
=>v1 - v2 = 3.2 ------------------(ii)
by (i) + (ii) :-
=>2.28v1 = -0.90
=>v1 = -0.40 m/s
=>v2 = -3.60 m/s
(c) By the law of momentum conservaation:-
=>m1u1+m2u2 = (m1+m2)v
=>5 x (-3.2) + 0 = (5 + 3.9) x v
=>v = -1.80 m/s
They are made of rock and metal.
The planets closest to the Sun are called terrestrial planets because they are made of rock and metal. Plato
Answer : The approximate acceleration of the car is,
Solution : Given,
Initial velocity of the car = 0 m/s
Distance covered = 120 meter
Time taken = 6.32 second
Using second law of motion,
s = distance covered
u = initial velocity
t = time taken
a = acceleration
Now put all the given values in the above equation, we get
Therefore, the approximate acceleration of the car is,
The resultant velocity and direction of the plane with respect to the ground is 704 km/h due east.
Air velocity v₁= 720 km/h
Headwind v₂ = 16 km/h
The air velocity due to east is greater then the head wind.
So, the direction of the velocity respect to the ground will be due to east.
The velocity of plane respect to ground
The resultant velocity will be
Hence, The resultant velocity and direction of the plane with respect to the ground is 704 km/h due east.