Rate of change of momentum = impact force
(m*v-m*u)/t = F
4000*20/t = 80000 (note: v is zero as it stopped)
<span>soo, t = 1 sec</span>
The answer is A. 446.9 J
Solution:
W = mgh
W = (3.8 Kg)(9.8 m/s²)(12 m)
W = 446.88 J or 446.9 J
Answer:
A
Explanation:
Frequency is defined by repetitions or periods per second. If we take any segment from each graph, we would see that graph A has the most repetitions per second.
The period of A is the shortest since the frequency is equal to 1/T, the smaller the period, the higher the frequency.
Answer:
v = 22.5 m/s
Explanation:
The speed of the bucket can be found using the following equation:
Where:
: is the final speed =?
: is the initial speed = 0 (starts from rest)
a: is the acceleration
t: is the time = 2 s
We need to find the acceleration, it can be found as follows:
Where:
F: is the force = 45 N
m: is the mass = 4.0 kg
Now, the speed is:
Therefore, the speed that the bucket will have is 22.5 m/s.
I hope it helps you!