Answer:
0.87ms‐²
Explanation:
Explanation is on photo above, it is easier to show steps than explain using words
Answer:
The Answer is B because the material the object is made of, the position, or the color have absolutely nothing to do with gravitational potential energy
Answer:
Part a)
m = 232.1 gram
Part b)
M = 928.6 gram
Explanation:
Part a)
As we know that frequency of vibration for a given spring block system is given by formula

so if it is given as 0.90 Hz then we will have

Now if additional mass is attached with it the frequency changed to 0.50 Hz

now divide two equations



Part b)
Now the frequency is changed to 0.45 Hz
so again we will have

again divide it with first equation above

as we know that m = 232.1 g
so total mass needed for 0.45 Hz will be

Mass of the dart = 0.01 kg
Speed at which the dart is thrown = 20 m/s
Kinetic Energy = (1/2) * mass * speed * speed
= (1/2) * (0.01) * (20) * (20) Joules
= (400 *0.01)/2 Joules
= 4/2 Joules
= 2 Joules
So the kinetic energy of the dart is 2 Joules. I hope this is the correct answer and it has helped you.
1. 450 J
2. ???
3. 1500 J
4. 800 kJ of work performed by the air conditioner
5. 2.4
6. 0 kJ