Answer:
0.962 s
Explanation:
Speed = frequency × wavelength
v = fλ
2.60 m/s = f (2.50 m)
f = 1.04 Hz
Period = 1 / frequency
T = 1/f
T = 1 / (1.04 Hz)
T = 0.962 s
A. Force
Hope this helps!!
Let's call this "certain amount" with a variable, x, (since it's not specified in the question, I will assume that the answer shall just be based on this variable).
So every additional floor will make the building sink by x, and let's make the unit cm, so x cm.
Now we know that the maximum depression is 20 cm, and it is also
x*y, where y is the number of floors.
So we have x*y=20,
therefore the number of floors is:
20/x or This is the answer
Answer:
v = 19.6 m/s.
Explanation:
Given that,
The radius of the circle, r = 5 m
The time period of the ball, T = 1.6s
We need to find the ball's tangential velocity.
The formula for the tangential velocity is given by :
Putting all the values in the above formula
So, the tangential velocity of the ball is 19.6 m/s. Hence, the correct option is (c).
Momentum = mass * velocity
p = mv
p = 1.5 kg * 40 ms^-1
p = 60 kgm/s
To find components of a vector:
px = p * cos(theta)
px = 60 * cos(30)
px = 51.96 = 52 (rounded to two significant digits)
py = p * sin(theta)
py = 60 * sin(30)
py = 30
He initial momentum is 60kgm/s
The horizontal component is 52 kgm/s
The vertical component is 30 kgm/s
