Answer:
The two balls meet in 1.47 sec.
Explanation:
Given that,
Height = 25 m
Initial velocity of ball= 0
Initial velocity of another ball = 17 m/s
We need to calculate the ball
Using equation of motion
Where, u = initial velocity
h = height
g = acceleration due to gravity
Put the value in the equation
For first ball
....(I)
For second ball
....(II)
From equation (I) and (II)
Hence, The two balls meet in 1.47 sec.
I think it is the last choice because light can travel as waves but it can also travel through a vacuum in an airless space.
Sound travels through the ear via compression
Answer:
(A)
(B) s = 146.664 m
Explanation:
We have given car starts from the rest so initial velocity u = 0 m /sec
Final velocity v = 88 km/hr
We know that 1 km = 1000 m
And 1 hour = 3600 sec
So
Time is given t = 12 sec
(A) From first equation of motion v = u+at
So
So acceleration of the car will be
(b) From third equation of motion
So
s = 146.664 m
Distance traveled by the car in this interval will be 146.664 m
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